I at least like the toaster if we assume instantaneous faster than light control. If I can sit and watch a feed of stocks and toggle a buy/sell toaster hooked up to the stock market 250 ms away, I can pretty easily beat the market and make money.

Similarly you could use the empty container rule to have someone communicate with you by toggling the empty state of a container. If you sense/not sense the container you have a reliable binary communication channel and Morse code is pretty viable too. But it’s probably best for a predetermined action because you’re racing the latency of light here and we’re not multiplanetary yet so you’ve only got hundreds of milliseconds margin to work with. Unless you contract with NASA or anyone yeeting things into space. Build an instrument that can Morse code via empting/filling a container and suddenly voyager can send us instant communication. Combine it with a set of control toasters and that’s pretty valuable too.

Teleportation: is there a cool down? Because most places can be teleported to in increments of 7 inches if I can chain them.