Perhaps "simple by nature" is not at the top of everyone's mind. Simple is great until you build something complex, or need to create a large reactive UI that is not a simple CRUD fetcher. Things like non-linear video editors, 3d editors, games, things with a large component tree that takes work to plan, build, and non-trivial to re-arrange thereafter.

Your "simple by nature" framework with one-way binding and render-the-whole-tree-when-something-changes now means you spend more time coding (fighting) React than you do your application logic. You could have focused on improving algorithms, but nah you're stuck architecting hooks, context providers, state management, and adding libraries that cement you deep into the React hole.

I think React developers all secretly want to use Solid but they're stuck using React at work, and just chant React is the best React is the best React is the best