Comment by epolanski

Complex APIs that require intimacy with internals with their gotchas.

Complex rendering model and hard to tame lifecycle since they ditched the class component. Very hard to get performant websites (but you're free to link me what you've produced with React and prove me wrong).

Also, biggest issue: severely misused for websites that are mostly static content and are nowhere near "app-like" nor have any particular reactivity need. 95%+ of react "applications" would've benefited from being written with a templating language instead.

E.g. Github was miles better under all aspects when it used ruby but of course somebody had to sell to upper management their promotion case.