It is basically VS Code Web. Try https://vscode.dev/ to see how you feel. If you don't like it you won't like cider.

I have used something like that (mentioned in my original reply ^). It was even worse -- there were about 3-4 plugins available.

Basically that company (a well known social media company, not FB) tried to implement everything on their own. Infra is their own (kinda makes sense because it is so huge), IDE is their own, communication is their own (which has an interesting feature that if someone screen shares an internal doc, other people can click a link to access that doc, too, very useful).

I was very jealous about their tooling team (that's what I call real programming), but nevermind I quit after a few months due to some unrelated reason.