When I joined my current team in 2015, they were still using Python Paste and jQuery for everything, while I was well-versed in Angular + a modern Python server framework. Armed with my modern libraries, I could do more in 1 day than an average teammate could in a week. In other words, my team lost a staggering amount of productivity over the past 2-3 years, just because they were hanging onto old ways that were still legit even in like 2011. And it's obvious that the half-life of frameworks is only decreasing over time.
What will happen when an average framework's half life is 1 year? Or 6 months? Humans aren't built to adapt so much, so quickly. I can gain proficiency with a new library in 3-4 months, but what happens when I get tired of doing that? Will I just fade into the background as some high school kid outproduces me 5:1 simply because he was lucky enough to learn FrameWorkABC a couple months ago while I was busy with a personal issue?
Hopefully by that time, the singularity will be so close at hand that we'll have bigger fish to fry, like basic income, or something.