Which of the Professor's inventions would you find most useful?

As a Canadian, probably some sort of universal translator that only translates into an incomprehensible, dead language

Body switching machine would be sweet. I'm off to laugh at the reaper!

The what if machine. The possibilities of that thing are endless. Products could be safety tested without the need for human or animal test subjects. It could be used you to vet political candidates running for office. If you used it for personal use then you could run every possible life decision through it to find the beneficial outcome.

The only downside is that people could literally spend their whole lives asking themselves what if using the what if machine than actually living their lives. Very much like that black mirror episode that featured the device that allowed people to relive all their memories.

Definitely the what-if machine. I could actually figure out if I'm going to use a product enough to buy it.

finglonger

That respawn toaster thing from the futurama video game would be quite handy.

The spaceship

When I was a kid we had sort of a fing-longer and it was so useful for all kinds of things! Mostly changing the TV channel without moving off the couch, but other things too.

So since we've already invented that, I'd probably go with the death clock.

What about the free will chip? I think giving free will to a robot would be quite nice. Even if it means humanities destruction 😛

Maybe some sort of death clock

I think the fing-longer, if only he could have invented it.

The fing-longer is definitely my favorite answer, but the what-if machine has to be the actual answer, right?