That’s what I do. I bought a thin client last year, because Raspberry Pi 4s were unavailable to me. So I (fortunately) bought a thin client and got into Proxmox. I have the following containers running on the machine (that i can think of right now):
Nextcloud (files, notes, contacts, calendars)
Jellyfin (media streaming)
Pi hole
docker host (with home assistant, traefik as reverse proxy for everything, anything else i want lol)
gitlab instance and kubernetes cluster (implemented in three containers, which is just for learning purposes)
Edit: some of the thing i want to do in the future:
paperless-ngx (server that a scanner can send files to so your pc doesn’t have to be powered on i believe)
actual budget (budgeting)
mediawiki / kiwix (hosting wikipedia dumps)
some other dashboard than heimdall for links to all my services
a vpn i can log into from outside of my home network (used to have pivpn on my spare raspberry pi, but want to have it as a container)