You have a source for that? The React code I've seen at Facebook is client rendered.

> Whenever they want to run JavaScript on server (e.g. rendering React on server) they just use V8 directly rather than using Node.

I forgot where I read it, but it was someone on the internet where they embed V8 and call from PHP (Hack).

https://hashnode.com/post/10-things-you-probably-didnt-know-...

It's true they don't really use SSR that widely, as Facebook.com doesn't really need it, but I'm pretty sure they do use streaming SSR, which offers UX benefits.

From your link

> Yes, Facebook uses SSR heavily. However, according to Lee, there are very few areas where they use React to render components on server. This was primarily a decision based on their server environment which is Hack.

Yeah this is my whole point. That person was attempting to school devs at Facebook on the benefits of server side rendering in PHP.

And whatever you said was quite niche.