I’ve got Jellyfin up and running right now on a DS620Slim NAS and it’s running pretty good so far. I’ve seen a lot of people say they prefer Plex over Jellyfin. What are the main advantages to plex?
I switched from Plex to Jellyfin several years ago and haven't really looked back. Overall I just didn't like the direction plex kept going (pushing shit streaming services, central auth, paywalling features), and dropped it even though I grabbed a lifetime plex pass back in the day. The only thing I miss about plex was the ease of developing a custom plugin for it since you could pretty much just drop python scripts in there and have it work, though their documentation for plugin development was terrible (and I think removed from their site entirely).
I still only use the free version of plex. I don't stream to other people but I am pretty sure the option to share my library is still there. I do stream from two other libraries on occasion.