Running my own NC server privately. For me, when it works, it's awesome, but it has the same issues that lots of FOSS software has, just random jank.

Seemingly random errors when updating. Sometimes my users randomly can't log in. No apparent reason, for a couple hours, their logins fail, then they start working again without any changes happening.

Remote VPS and very stable connections. Certain apps will just crash randomly, like Decks, they sometimes just freeze up.

My VPS hardware is above the recommended minimum specs, but maybe it still needs to get beefed up, idk.

I still like NextCloud a lot, but it's definitely been kind of rough for me.