Two very good points here. The second is the one I’ve been thinking about recently. It’s about considering what format your data is kept in and if you can usably get that out and implement it somewhere else without too much work.

Yea I use a 4GB RPi 4 and it handles several services really well, all running in docker: Grimoire Navidrome Traefik Seafile + Collabora integration Gitea Vaultwarden Radicale

It idles just under 2GB most of the time so it’s doing well.