OK, so the ideal microwave has just 1 nob. You turn it, and that gives you the time. And as soon as you let go, it starts up. Can't get simpler or easier to use

OK, so the ideal microwave has just 1 nob. You turn it, and that gives you the time. And as soon as you let go, it starts up. Can't get simpler or easier to use than that. For the nob, I would want some type of exponential scale for time. Most people care about the difference between two and three minutes, but the difference between 20 and 21 minutes is inconsequential. Would that be confusing though?