For private use? Hot take, but Arch. It’s easy to maintain and not easy to break at all. I think I spend zero time on maintenance other than running package updates. I only reinstall when I get a new computer.

(I say for private use only because you’ll be getting weird looks from people if you use arch on a server in a professional setting, and it might break if you try to update it after five years of not doing it since there aren’t any “releases” to group big changes - in practice I run arch on my home server too with no issues)

Is immich in a usable state yet? I was looking for a self-hosted image service a while back, but eventually I just went with pigallery2 mostly due to the extremely simple file storage (just point to a folder and you’re good to go), but I do miss being able to manage images/albums from the website and having a more mobile friendly version. I kind of avoided immich due to the repo saying it’s under very active development (#scary).