I can only think of a NAS server. Probably. Still as media / streaming server.
What else could you do? Am there something uncreative. Quietly write a few ideas! Thanks. (Time without the hardware limitations ^^)
We have 3 PC's, 2 laptops, 2 televisions, 4 Smatphones, 3 Amazon echoes and often times many (15 people) to visit.
Hosting a website (can be a private one too) hosting gameserver, cloud storage (mycloud and etc), video surveillance, video / 3d rendering or CI / CD pipelines (jenkins and etc) could still be done.
Nextcloud (own cloud)
Pihole (own DNS server with adblocking)
Teamspeak, various gameserver
I know Pihole. Is this synonymous for "right" computer?
Logically runs on any linux distribution or ma best with docker
So if it fails creativity, please.