I have Jellyfin running for years too and it has never broken for me, I use Linuxserver image, so maybe they delay the updates a bit?.. Now, Immich has broken so many times that nowadays is the only docker I don’t keep at latest (and I know using latest is a bad practice, I understand the reasons, but the convenience of not worrying about the versions beats all that for me)
I’ve been using jellyfin for years.
My best recommendation is DELAY UPDATES and back up before you update.
I have a history of updates breaking everything so you should be careful about them.
All software recommends backing up before an update, but for jellyfin the shit is real, you really want to back up.
I have Jellyfin running for years too and it has never broken for me, I use Linuxserver image, so maybe they delay the updates a bit?.. Now, Immich has broken so many times that nowadays is the only docker I don’t keep at latest (and I know using latest is a bad practice, I understand the reasons, but the convenience of not worrying about the versions beats all that for me)
Like the version or the media?
I have it on docker with two volumes, ./config and ./cache
I back up those before each update.
A bad Jellyfin update should not mess with your media folder in anyway. Though you should have backups of those aswell as a rule of thumb.