True, you can always have leaks, but hydrogen leaks seem to be way, way more common than leaks of other fuels as a percentage of launch attempts. The shuttle was scrubbed on average almost once per launch, and a large percentage of the scrubs were caused by hydrogen leaks (source).

And that's on top of the whole embrittlement problem, which can lead to catastrophic hardware failures if you're reusing parts over a long period of time, which is another reason why folks trying to do reusable rockets (e.g. SpaceX) tend to avoid it. And if you think embrittlement is a risk in something that gets used once, imagine the effect on fuel lines in cars that are pressurized for decades at a time.

It is a really, really nasty fuel, IMO. Mind you, hydrazine is worse in some ways, but that doesn't mean hydrogen isn't nasty. :-)

I understand your knee jerk intuition about crypto currency. But very earnestly I suggest learning a bit about monetary policy. It's indispensable. And after that you may want to read about bretton woods and how banks in different countries actually can trade money to each other. The US treasury and its impact on monetary policy enables this. It's not just a methodology in the sense that bitcoin is a method for moving money. Monetary policy is how countries can perform the miracle of Keynesian economics to regenerate Growth in a downturn. That cannot ever be done ever without fiat currency and a central bank. Period. This was. Why for example Germany plunged in to pre-hitler ruin after world war 1. There was no way to climb out of turned down economy when you had no gold reserves (France took them). Germany only managed to recover when they pegged their mark to a kilo of wheat-- not a long term solution but a desperate move that mostly worked. But the economic malaise didn't end till Hitler started spending money into the economy. That was made possible by moving off the gold standard prior to Hitler.

Without monetary policy you are left with the austerity of Austrian economics which pretty much inverts the rational of monetary policy and loses all it's advantages.

If crypto ever rises to rival the dollar you can kiss the USA goodbye because it will mean the end of monetary policy and central banking. If you say good riddance, I think you may not understand how the world works

One possible exception: Rental cars at airports. But only to a point.

Statistics is highly useful for CS, and calc is a prerequisite for (real) statistics.

Not if coding is all you can do. That's his point. He's not saying you don't need a degree, he's saying you do need it because it teaches more than just how to code. If all you want is to code, you don't need a degree. But if you want to be a computer scientist or a software engineer, you probably do need a degree... and Google hires computer scientists and software engineers, not coders.

Heh. That reminds me of a conversation I had with my academic advisor in the CS department back in college (~35 years ago). I had been working as a programmer for a couple of years while going to school to get my degree, and had been writing code of various sorts for a decade. I was also young and very cocky. While laying out my path to graduation we were looking at scheduling the required software engineering series. I asked if there was a way I could skip it because "I've been writing code for a while, so I'm pretty sure already learned everything on my own". The professor gave me an indulgent smile and said "I think you should take it anyway".

Looking back, I'm embarrassed for and amused by my younger self. So clueless. So arrogant! I assumed I had discovered, on my own, in a few years of solo projects, the software engineering lessons accumulated by the industry over decades of large-scale projects. I took the classes and immediately realized how much I didn't know, and that the classes were only going to scratch the surface. In hindsight, I'm not sure "scratch the surface" is even accurate, but they did at least make clear to me that I had a lot to learn, and show me something of what the shape of that knowledge might be.

As for whether you can get hired by Google without a degree... you actually can. Google cares about capability, not credentials. That said, there aren't many non-degreed SWEs at Google, because auto-didacts smart enough and dedicated enough to give themselves a good grounding in all of the things a decent degree program provides are pretty rare.

It is hard in practice to get hired without a degree because the recruiters generally discard resumes that don't include a degree (or clearly-equivalent experience), but if you happen to know a Google SWE and can convince them to give you a mock interview (most are happy to unless it's clear to them that you're going to fail badly), and you pass, they can jump you past the screening process, straight to the onsite interview.

You're grossly overestimating the required range for most of those things. School buses travel an average of just 63 miles per day. Mail trucks? 25 miles per day. Or were you planning to charge them only on weekends? :-)

Mind you, that's not the whole story for school buses, because they also have to be able to take the sports teams and bands to out-of-town games and competitions within a 200-mile radius or thereabouts, so for those long runs, you would need at least a 400-mile range to do a round trip, or else the driver would need to be able to take it to a Megacharger or similar close to the destination with a 200-mile range. But you could also keep a small number of diesel or gasoline buses for that purpose if you want, at least for the foreseeable future.

To be clear, I'm not saying it isn't the right choice for them. I'm just bothered by claims that they don't have a choice, as though this were forced, rather than a strategic decision to prioritize profits and simplicity of their billing architecture over inclusiveness.

Sure. That's common when technology is in its infancy. Those problems could be solved, given enough time and money. In theory, so could the leaks, though given that NASA tried to fix them for three decades and still had leak problems on Artemis, that remains a theory. :-D

Hydrogen has much bigger problems than filling time, freezes, or the occasional explosion from dispensing a gas at high pressure incorrectly. If those were the biggest problems, I'd be totally in favor of doing more with hydrogen and fuel cells, because those are manageable and/or fixable technical problems.

A much bigger problem is fact that almost all hydrogen comes from natural gas, which makes it anything but green. The dirty little secret is that your losses from leaks would make distributing it over oil pipeline infrastructure completely infeasible, so you'll end up distributing natural gas instead, and cracking it to make hydrogen. And now, you have all the CO2 emissions from burning natural gas, plus all the efficiency loss from cracking the natural gas ahead of time, and you're about as green as a forest fire.

And of course, if you get it through electrolysis instead, you're likely wasting considerably more than half the energy you put in, versus more like 1% loss when charging a battery, making it a huge drain on our power grid.

And the elephant in the room is the cost per mile. In California, current prices for hydrogen fueling are hovering around $36 per kg, or about 50 cents per mile in a typical hydrogen-powered car. This makes it almost an order of magnitude more expensive than BEVs, and there's no real reason to believe that this will improve at this point, given how long it has failed to improve. At best, the whole thing feels more like a glorified government subsidy capture scheme, rather than a serious means of powering cars.

Hydrogen is a terrible idea on multiple levels. The fact that ostensibly it could have been a short-term workaround to provide multiple means of getting energy into rural areas (gas pipelines and power grid) is nice in theory, but in practice, the losses are just way too high, and batteries just work way too well, so the benefits just don't hold up in practice.

*shrugs*

Hydrogen leaks were one of the most hated aspects of the Shuttle design, too. It's routine until it doesn't work. Then it's a huge pain in the backside. The shuttle, Artemis... both of the two big NASA designs that used hydrogen had big headaches from hydrogen leaks. At some point, you start to see a pattern. (Whether that pattern is hydrogen or defense contractors, I couldn't say. :-D )

*shrugs*

There are literally almost one thousand companies that do this. There's no way that none of them would be willing to process your payments for a high enough fee.

There are quite literally payment processors that specialize in high-risk merchant accounts (e.g. PayCompass).

Yeah, there have been problems over the years caused by payment processors being a**holes. And other companies have come in to fill the holes they left behind. That's the thing about capitalism: When one company won't do business with you, there's almost always somebody else who will, if there's enough money in it. And there's *definitely* enough money in it.

These companies just don't want to fool with it. And I get that. But I really get tired of them acting like they have no choice. They have a choice. They made the choice to pay lower fees on everything in exchange for not selling that. They could also have chosen to use a processor that specializes in high-risk transactions and raised commissions across the board to make up for it. They could also have split their purchases into adult and non-adult purchases and used a high-risk merchant account for the first and a normal merchant account for the second, and raised commissions only on adult content that the first processor considered high-risk, adjusting the line over time, as needed.

There are always options. Those who say they have no choice are almost always just making excuses for poorly thought out decisions.

The main problem is probably that Steam supports PayPal, which is one of the most restrictive payment processors out there, and PayPal probably gets mad if you can't pay for certain things with PayPal because of PayPal's AUP. Heck, Steam might even use PayPal under the hood for all of their transactions, for all I know. But the thing is, Steam chose to tie themselves to that payment processor, and nothing stops them from walking away.

And by "more difficult", you mean that there is a massively larger amount of efficiency loss. If you're lucky, you recapture 60% of the energy in the fuel, and multiply that times the 75% efficiency for electrolysis, if you're lucky, and you're throwing away more than half the energy that goes in. So if folks are freaking out about the power grid not being able to handle EVs, imagine what would happen if you doubled the power requirements.

It's not really that bad. You can put probably ~500 miles of range into a hydrogen fuel-cell vehicle in 7 minutes versus 200 miles in 15 minutes on a modern EV. It's actually pretty comparable to a gasoline-powered vehicle. But you do still have to stop, unlike with an EV, where 90% of your charging can be done plugged in at home while you sleep. So in that sense, it's slow.

I've said similar things about NASA's Artemis mission for the same reason. Doesn't everybody want to use a fuel that is almost impossible to keep from leaking, and then spend the better part of a year with the rocket stuck on the pad trying to fix the leaks so they can launch it? :-D

Is it really? If Steam said, "No, we'll find another processor that isn't trying to run our business for us," they would probably not get as low a fee, but that's far from existential. It's not like the actual payment networks give a crap. They get paid either way, even if the transaction gets refunded. It's the merchant account providers that are the issue, and if one is a problem, there are almost a thousand other companies who will gladly step in and fill the void.

So from my perspective, this is Steam saying, "We've decided that the cost impact from taking payments for this type of content is too high, so we're not going to sell it anymore," which while entirely within their rights to do, is a far cry from "The payment processors made us do this." There's always a choice.

Payment providers don't work with game developers anyway. Payment providers work with Steam. Steam can't pay developers in certain countries, and they therefore presumably aren't eligible to sell on the Steam store.

So no, this has nothing to do with who gets the money. No matter what, Steam gets the money, and Steam pays somebody else.