I've never got the meme about numpads on microwaves being needlessly complicated design. On about any decent microwave made in the last 10 year, pushing 1-6 gives a cook time of 1-6 minutes, respectively. Pushing start again after cooking has started will add 30 seconds. For longer cook times, press "time cook." Maybe this sounds a bit complicated, but it's efficient and all written down on the keypad. Mechanical timers really don't work well for less than 5 minutes. Good microwaves with a dial use a rotary encoder and increase time logarithmically. It sure looks elegant on the builtin over your stove, but log scaling really isn't intuitive outside volume controls, and probably more fiddly than buttons.

If there is a gripe to be had about microwave numpads, it's the useless popcorn setting. The microwave popcorn bag tells you not to use the popcorn setting. It's like something out of bad standup. /rant