What PC? Some boards run Armbian:

https://armbian.com/

Yeah it does but it really vary from vendor, arm much locked down to what vendor do

Linux will run on a potato, and it doesn’t even have to have hardware memory management.

Does it work on arm terminals? I want it on a Pip Boy. Do I need to run the Demon Summoning Program in Wine or is there a native ELF class?

My iomega ARM based NAS from 15 years ago runs Debian

It’s already running on a gazillion devices.