I can’t think of a switch you won’t ever need. I think the “sce to aux” story is a good example of when you need it you need it.

The motor could turn with the wheel. You could have a wheel-motor without the excessive unsprung weight of the motor components.

It still has corners that need to have a moving seal. This is a huge issue.

It’s pretty smart. It is like a wheel-motor but without all the unsprung weight.

They aren’t. Light ircraft now use touchscreens that you are supposed to use while bouncing around. They had a knob for a while but then it seemed touchscreens took over. With the knob you still had to look, it at least you didn’t have to aim at a bouncing spot on the screen.

Also make them illegal in aircraft! And spacecraft! Seriously stupid.