- the core feature, file sync, has extremely unreliable clients that can't resolve even the simplest of conflicts reliably while sucking up 8 CPU cores to do... nothing, really
- all the ~ecosystem~ of plugins they decided to staple onto it because file sync doesn't make them money, are all low quality compared to dedicated solutions, and synergy between them isn't great enough to make up for all the problems
- the plugin API is utter garbage and deliberately underdocumented, to force you to hire the devs as consultants to undo their own mess (which probably is a major driver for #2, you spend too much time fighting the APIs to get useful work done)
- "core" plugins get randomly deprecated with no useful replacement
So whatever you use nextcloud for, something else does it better
- the core feature, file sync, has extremely unreliable clients that can't resolve even the simplest of conflicts reliably while sucking up 8 CPU cores to do... nothing, really
- all the ~ecosystem~ of plugins they decided to staple onto it because file sync doesn't make them money, are all low quality compared to dedicated solutions, and synergy between them isn't great enough to make up for all the problems
- the plugin API is utter garbage and deliberately underdocumented, to force you to hire the devs as consultants to undo their own mess (which probably is a major driver for #2, you spend too much time fighting the APIs to get useful work done)
- "core" plugins get randomly deprecated with no useful replacement
So whatever you use nextcloud for, something else does it better