Even React, despite being much slower than SolidJS, etc is rarely the bottleneck. Slow JS apps tend to be doing stupid things like blocking UI updates on network requests or updating state in such a way that triggers repeated re-renders when only one is required.
I mean, I think that's kind of fair. It is an issue with React that this can happen. On the other hand, it's pretty much always possible to work around it within React without switching to another framework. So IMO if a team is shipping a React app with performance issues then that's on them.
