My use for it was to have a 5 way residential VPN across multiple Countries for obvious reasons. That wouldn't really suffice with just ssh. It also makes the shared infrastructure a lot easier to use for the rest of my family.

Also a globally accessible pihole connected to DoH which ensures somewhat global privacy.

They are basically my perfect use for my raspberry pis. Extremely low power, but perfectly capable for handling say 1080p video streams or to RDP into machines for access to cross-country resources.