The last time I bought a microwave I had two feature requests:
Two knobs, one for time, one for power.
An inverter so it would run at that power instead of just turning on to full power for a while and then turning off and on again, which ends up scorching food and blowing fuses.
Apparently, this was too much to ask. I get the impression one company has the patent on the inverter tech, and they refuse to put a simple interface on their microwaves.
I read somewhere that it isn't possible to not run a microwave at full power. I don't remember why.
I agree on the two knobs though. I noticed after I buying an expensive in wall microwave that the thing would randomly glitch (you have to power it off to use it again). You have to use a "race condition" to launch it at full power without having to set the power then the time and then press the start button.
I had no idea you could fail so bad at making a microwave.