My position isn't that we should be using a new library per se. It's that we should be more selective about what 3rd party code we use and espescially what we ship to end users. React has tended towards a kitchen sink approach and this is exacerbated by initial design shortcomings/decisions i.e. no built in state management or method for encapsulating styles has lead to a deluge of libraries that promise to fill the gaps, none of which quite work with one another. This I guess is why we've seen the rise of meta-frameworks like Next which fill this gaps in a predictable way. But these just meta frameworks just shift developers another step further from the underlying HTML/CSS/JS making it harder to debug things and harder to fix issues when you stray from the framework's happy path.

(All that said, I don't blame people for choosing React for certain classes of projects, the economics of hiring new devs, the relative maturity and stability , the large community etc all make for powerful incentives to choose React)