I don’t know if it’s still the case but kernel support and related was nearly always an issue when I tested Raspi alternatives for building homebrew robots. OS updates were a gamble and support and documentation was not good to say the least. Raspi also has every HAT you can imagine to extend their capabilities too.

savagegeese are great at this.

There’s a company doing this already. Giant battery sits behind the cab. They drive up, unplug it like a LEGO with a huge robot arm, plunk in a new one and good to go.

IIRC the Voodoo 5 6000 also required an external power supply and people thought this was crazy at the time.

Someone was really into Saints Row 2.

I got one after a surgery because I couldn’t touch my butthole without screaming. And I still thought they were weird. Now I can’t stand it if one isn’t available. Fwiw, if you are a relatively clean pooper the toilet paper is mainly for drying off.