There’s a joke that could be made about how the first Moab was born of incest just like the last known MOAB, but I’m not clever enough to come up with it.

With the enshittification of streaming platforms, a Kodi or Jellyfin server would be a great starting point. In my case, I have both, and the Kodi machine gets the files from the Jellyfin machine through NFS.

Or Home Assistant to help keep IOT devices that tend to be more IoS. Or a Nextcloud server to try to degoogle at least a little bit.

Maybe a personal Friendica instance for your LAN so your family can get their Facebook addiction without giving their data to Meta?