I'm not really sure why this focuses so much on React, when it's a general "issue"/"feature"

More broadly, obviously there is some pressure to use a framework/library/programminglang/editor that has better LLM training. But even before LLMs.. you'd want to choose the one that has more SO questions, more blog posts and books published about it. The one where you can hire experienced programmers.

New players has a certain activation energy they need to overcome - which is probably good. B/c it slows down the churn of new shiny with incrementally improvements. I think a paradigm shift is sufficient though. Programmers like new shiny things - especially the good ones that are passionate about their craft