> I tried for weeks to get OCIS working but gave up and went back to ownCloud 10.

I literally just finished my move from Nextcloud to ocis yesterday (Docker). There were so many silly issues (e.g., I spent 2 full days trying to figure out why an image was getting a 500 error, only to learn ocis doesn't support tall images). I have a full install script and integrated motomo too. So ping me if you want to give it another shot. (I deployed Baikal to replace dav functionality.)

Nextcloud has all sorts of problems and bloat. It's not worth it anymore to me.