But it doesn't cover all use cases -- I regularly cook things for e.g. 15 minutes at 10% power, to defrost and warm them evenly. That's one of the main thing I use my microwave for, actually.

I don't want to have to hit +30 thirty times in a row. If it's digital, I'm gonna need a number pad.

I would be perfectly happy with clearly labeled time and power knobs, however -- but I'm not sure it's easy to make a knob that works accurately and intuitively for both 30 seconds and 30 minutes.