It sounds like YouTube is heading towards conflict with it's long-term content providers as well. Their new algorithm heavily favors "shorts". This really screws over the traditional medium to long format creators who arguably made YouTube successful. Sounds like they want to move quickly into the TikTok space but it's sad for a lot of creators who are losing significant income d/t this change.

Personally I see the variety of frameworks as a sign of health not fragility. Vue, eg., spurred React to become much better and less tedious to code. Svelte took nextjs which is commonly used for React and made an even better framework imo, while React keeps improving. You can even mix and match components. Personally I think JS is overall very healthy.