I would say sway for Wayland support. Better yet, Hyprland is an awesome one and well supported in Nix. Maybe disable animation to reduce memory usage

Thank you

You definitely want an 8th gen (Intel) or better to have Jellyfin Quick Sync support. It’s what I have (i5-8400T) and it offer a fairly decent AVC (h264) and HEVC (h265) transcoding for my usage. However, for futur proofing consider an 11th gen for the AV1 support.

I’m containerizing everything, I like to keep my setup simple, no OS containerizing since I will be using a low power minipc (NUC, Hp mini, dell micro or lenovo tiny), I will use proxmox in the VM to get an idea on how it works and because I think the web UI might be easier to use than SSHing to the VM. Later on the new server I will mostly use debain+docker.