iPhone users have no clue.

Geeks check specs on third-party websites, 'cause Apple doesn't publish this info. There's no "specs" on the page either. You just trust you're buying something sufficiently specced.

Everyone else doesn't care.

Fat margins don't just happen.

Last time I had a PC with that much RAM was in 2007.

Longevity of Recordable CDs, DVDs and Blu-rays â" Canadian Conservation Institute (CCI) Notes 19/1 claims: DVD and BD (read-only, such as a DVD or Blu-ray movie) : 10 to 20 years which is even worse than BD-RE, rated 20 to 50 years.

I've not been able to find any research on the topic.

I'm curious: I've read many times that pretty much all organic optical media has a certain lifespan, 15-20 years at most, normally less than that. And I'm almost sure that as we go higher with storage density, the problems gets even worse, so CDs may survive longer than e.g. Blu-Ray disks. How do fans deal with this? Or they are not thinking that far?

But what about people who weigh way more than all the stuff that I'm carrying times 100? Why are not airlines addressing this "minor" issue as more weight means more fuel? Or it's not about it? If it's not about weight then what?

There are people who are overweight/obese due to medical issues (or even pregnancy), but the vast majority simply eat too much or eat junk food. Maybe extra body mass could be actually addressed first.

Somebody needs to explain how its going to be the currency of the world when it can only do 7 transactions per second.

The Lightning Network but it's not perfect.

Also somebody should explain to me why bitcoin is the best of all cryptocurrencies, just because it was the first. Satoshi?

The first - yes, the best? doubtful. What really sets Bitcoin apart is that it has no creator (Satoshi has never been discovered, some believe he's not just one person, he represented an organization) or company behind it. There are developers but they don't run around advertising it or promising anything. There's a sense that it's truly public, decentralized and there's no personal interest involved.