My cheap unbranded microwave has a dial to set the power (which is always on max) and a clockwork dial to set the time, which also starts the oven when turned.

My cheap unbranded microwave has a dial to set the power (which is always on max) and a clockwork dial to set the time, which also starts the oven when turned. This is the best UX of any microwave I’ve ever had - I can start it with the correct time in a single action just by feel - I don’t even have to look at it. I very much doubt it has any firmware to speak of, or what feature such firmware could possibly offer that would improve my experience.