I don’t disagree on that front, the React ecosystem is huge, and rebuilding a load of complex components is often beyond the budgets of many greenfield projects.
I also don’t believe a React monoculture is good, so a growing Preact or Solid ecosystem would be really positive, alongside growing web/DOM standards to ultimately make these frameworks more of a light wrapper around some trivial updates.
React and Next.js, to me, have done the typical architecture astronaut thing, and it feels like they’ve both increased the barrier to entry and just made everything a little more complicated than it really needs to be for much of the web.