It was recently renamed to Stoat after a cease and desist letter over the name. Link here

I once tried it a year ago when known as Revolt when browsing for Discord alternatives. It wasn’t great then, but it’s improved somewhat since then since then. It’s technically a centralised platform, albeit people can self-host it themselves if they wanted to. It’s fairly well designed and closer to Discord parity than any other alternative I’ve seen (whilst Discord does have some cool stuff, a lot of its excess is completely slop that can be ignored). I’d personally prefer a federated Discord - but we don’t seem to be anywhere close to that soon. “Roomy” for Bluesky is at the very beginning of its development.

I know some people here use Matrix, but it hasn’t really taken off for general usage outside of Instance Meta chats - and I personally find it to be quite a cumbersome and sometimes buggy client that really isn’t designed like Discord.

It’s a bit frustrating that we have a lot of development of Reddit alternatives now via Piefed and Lemmy, but a true Discord alternative a long-way away.