React (and Vue, et al) was built with client side rendering in mind. It just does not seem to fit the server side rendering pattern.
What are the use cases? From my perspective, if your app is a rich web app with a lot of interactivity, you probably want CSR and don't benefit much from SSR.
If you have a content-centric site, or a site with some interactivity but not much, you want a static site generator, or SSR. But in that case, a template engine with some smaller client side libraries (jQuery or AlpineJS or idk what all is out there).
Using React SSR for all of these seems like the wrong tool. What am I missing?
React and Vue already have lots of libraries, components, and know-how. You can also move from CSR to SSR and back depending on your requirements.
That's definitely the best argument for it, I don't deny. But I'm glad to see the web components space to be improving as well.