I don’t know… the overall tone seems to be a bit too negative for me here.
I have used Nextcloud at home for years now without issues and we also used it at a large university where it worked just fine (from a user perspective; I don’t know if it gave the administrators nightmares). I do agree that they should invest more time in polish and stability and less in swanky new features that many won’t need, but that would not lead me to discourage anyone from using (or at least trying) Nextcloud.
I have used Nextcloud at home for years now without issues and we also used it at a large university where it worked just fine (from a user perspective; I don’t know if it gave the administrators nightmares). I do agree that they should invest more time in polish and stability and less in swanky new features that many won’t need, but that would not lead me to discourage anyone from using (or at least trying) Nextcloud.