I've setup Nextcloud but have done next to nothing with it.

My Lemmy instance gives me the most problems, but it's also the only publicly available service I run. Mostly the issue is it seems to have a memory leak that forces me to restart it every few days.

Everything else has been completely rock solid for me, running on a mini pc (formerly a pi4 until I wanted to start doing stuff with Jellyfin and needed more power for transcoding) on OpenSUSE Leap all in docker containers. Makes it insanely easy to move stuff. I had no issues basically just copying the docker-compose files and data and bringing them up even when switching architectures.