It’s mostly Mastodon. (Shoutout to @RmDebArc_5@sh.itjust.works for posting the link to FediDB)

I’m an old man when it comes to major changes. If it’s salvageable then maybe stick with what you’ve got. Have you used lazy docker or watchtower?

Lazy docker should give you a more reliable interface (TUI, over ssh, not a GUI)

Watchtower (aims to) update your containers for you so you don’t have to go through this pain in the first place :)

Personally, I run my Nextcloud and Jellyfin servers on NixOS with auto updates on. It’s been chugging along great!

send to the dumpster any computer produced before 2018

You mean send into the arms of a frugal Linux enthusiast ;)