Hey, I don't use the server, but here's the release page outlining what's in the beta vs stable: https://github.com/music-assistant/server/releases
Have a read and see if any functionality in the beta is something that's important to you, if it's not, go with stable.
I used to use r/listentothis, haven't in a long time though, not even out of "fuck you reddit" just busy I think.