Did you look at the video I linked to? "Get ready to print 10x faster" is definitely a claim made in the video.

I will quote the kid's own video on the subject (https://www.youtube.com/watch?v=z1Clhn9t-u8)

"The most advanced, the most reliable, the fastest 3D printer ever created"

The distance travel thing is perhaps not ideal now, but that's a problem that will be solved in time: Tesla alone is building a ludicrous number of such stations along highways in US/Canada/Europe, and their recent patent moves indicates that they'd like to improve on that even more by having other car companies build their own compatible stations and everybody shares all of them. They can probably never share the swap stations (just because the requirements on the car side of things for that would be way too specific), but just getting more charging stations would help a lot.

In terms of not wanting to miss a charging station, that shouldn't really be an issue, as you can have the car's satnav automatically hit up the charging stations along your route, so that you don't need to think about it.

You don't need as many supercharger stations, though, because they're not a direct replacement for gas stations. Mainly, the expectation is that you will charge your electric car at home overnight, starting each day with a full charge. Public charging stations, then, are only required if you will be driving a great distance.

Gas stations, on the other hand, are effectively the only way to refuel your gas car, so there needs to be a larger number of them.

If you get enough supercharger/swap stations to cover any likely long distance routes, electrics end up more convenient, because you'll always start each day charged and never need to stop anywhere during daily commuting and use.

They still have gender-specific tournaments. They've changed their policy, but they haven't fixed it.

They changed their stance slightly, they're still going for gender-segregated tournaments. They'll have "mixed" and "female-only" tournaments. That isn't an improvement.

We expected the new rules to increase the use of devices during takeoff/landing from 0% to not-0%... not increase the use of devices in general.

In eurocents, my local power company (37 GW installed capacity) charges 3.83 ct/kWh, and they are highly profitable.

Of course, our power company is owned by the government, the rates are set by the government (at levels that are still very profitable), and all their power generation capacity is renewable with plants lasting for many decades (hydro). I realize that not everywhere has anything like the hydro capacity available, but nuclear plants can last similar amounts of time, and solar prices can be much lower than what power costs in Germany (perhaps why solar is becoming so popular there). Unsubsidized solar costs less than half those prices you're quoting for Germany.

Yes, because the idea of harnessing a supervolcano to build a 3900 mile long tornado-killing wall sounds so much more reasonable ;)

Yes. I bet you could get a sweet deal on that 3.4 trillion cubic feet of concrete, because any company would love to have your ten trillion dollar concrete contract.

No need to mention that the wall alone would require doubling the world production of concrete for 12 years just to produce enough...

Yeah, but he's talking about a wall that is about 3.4 trillion cubic feet of concrete. Doesn't matter what the purpose is, that's an insurmountably high cost. Some googling shows that concrete costs roughly $3 per cubic foot. So... you're looking at a bill of materials for this wall of about ten trillion dollars for concrete alone, before the cost of labour and equipment...

Nobody says "it's too expensive to build hydro plants" here, because all of our power is from hydro, and it's quite profitable for the government (who owns the power company)...

If the Hoover Dam would have cost $10 billion today, that would only serve to bump up my cost estimate by an order of magnitude. I don't think that there's much of a difference between a $15 trillion and $150 trillion public works project, both are effectively "infinity dollars".

One mile of this wall would seem to me to be like roughly five hoover dams. The hoover dam cost $750 million in today's dollars. So wouldn't one mile of this super-wall cost $3.75 billion, not $160 million?

On the other hand, building a concrete *anything* that is a thousand feet tall and 165 feet thick isn't easy. They're claiming that a one-mile stretch of the wall would cost $160 million, which comes out to 871.2 million cubic feet of concrete, or a cost per cubic foot (including labour and materials) of about $0.18. That sounds really unlikely to me.

Let me put it this way, the hoover dam is actually relatively similar to what we're talking about here. It's roughly 700 feet tall, varies from 45 to 600 feet thick, and is about a fifth of a mile wide... So let's say that the cross section of the hoover dam has about the same area as this proposed wall.

OK, so now we just need the length of the wall. Well, the circumference of the American midwest is roughly 3900 miles (cutting through the great lakes, because what the hell). So basically, what we need to do, is build the equivalent of roughly 20,000 hoover dams.

The hoover dam cost the equivalent of about $750 million to build. I suspect it would cost a lot more today than pure inflation would account for (unions, health and safety standards, etc), but let's say that technological progress would counteract all that...

So, $750 million, times 20,000... and we come up with $15 trillion.

It's actually a team of just 4 working on No Man's Sky. The other 6 people are working on other things (not everybody at the company is working on this one game).