Just made switch-controlled doors, so I needed programmer art for useable toggle switches, and the toilet was convenient. Hmmm.
The tech that runs conveyor belts isn’t special-cased, it can do a lot of other stuff. Like, for instance, cancel gravity and act like a cool fan pusher! (they can also push you in horizontal “push beams”, etc – very cool stuff)
Conveyor belts are one of the newer bits to go into Hot Tin Roof. They do… exactly what you’d expect.