* Download agent (i.e. torrent, JDownloader, ARIA)

* Tailscale exit node

* Endlessh tarpit

* Sadly more reliable than my Mac Mini when running server workloads (lots of open SMB files crash MacOS)

And all of this at quite a low power dissipation, which is the primary expense in running a home server.

I don't do these things, but could:

* PiHole

* Kodi or Plex STB

* Add a hat and have an indoor air quality monitor or similar