My Nextcloud has always been sluggish — navigating and interacting isn't snappy/responsive, changing between apps is very slow, loading tasks is horrible, etc. I'm curious what the experience is like for other people. I'd also be curious to know how you have your Nextcloud set up (install method, server hardware, any other relevent special configs, etc.). Mine is essentially just a default install of Nextcloud Snap.
Edit (2024-03-03T09:00Z): I should clarify that I am specifically talking about the web interface and not general file sync capabilites. Specifically, I notice the sluggishness the most when interacting with the calendar, and tasks.
Docker, using the nextcloud:stable image (not-all in-one) with postgres, behind nginx, and finally ZFS with 2x modern HDDs for storage. I run the stock apps plus a small handful, and have carried the same database through many versions over the last 5 years.
It's usable, but definitely not snappy.
The web interface for files is fine. Not instantaneous at all but not a huge problem. I have about 1TB of files (images and videos) in one folder, then varying files everywhere else. I suspect that the number of files (but probably not the size) is causing the slowdown.
Switching to, for example, the notes app is incredibly slow, and the NC Android app is just as bad.