I don't blame them. They want to get paid well, and having experience with 'stuff that hasn't even been invented yet' makes them look innovative. And, generally, looking innovative means a big pay increase.

What's funny to me is that I've had a track record of leading and building core parts of successful applications used by millions of people. Yet, when I go to interviews, often they don't seem to care about my successes. And, to them, my methods look ancient. And, they express disbelief when I ask for $200k (a paltry sum compared to how much time and money that they'll spend).

Which to be fair is entirely rational from their own points of view

Yes mostly due to Resume Driven Recruitment. All the soft skills and technical acumen become worthless to many companies if you can't hit those language and stack bullet points.

Maybe but if their managers are okay with this, then either they aren't technical enough or they're not being paid enough.

or the managers don't have the right incentive. I manage a team of devs at a startup, and beside some promise of "do well, get liquidation event" I have no incentive to make a good product other than personal pride.