Look for the word inverter. An inverter microwave can actually adjust its output power. Expect to pay a bit more but the cooking is better and if you have a circuit in heavy use it can let you run the microwave at half power and the toaster at the same time.
Okay; lot’s of memey answers here.
But I saw a video from “Technology Connections” and as I understand it most popcorn buttons are just timers.
However some microwaves have weight sensors and hydrometers. Most microwave buttons suck but some are actually good.
Another thing to watch out for a new microwave is whether or not low power mode means 20% power or 100% power 20% of the time.
Look for the word inverter. An inverter microwave can actually adjust its output power. Expect to pay a bit more but the cooking is better and if you have a circuit in heavy use it can let you run the microwave at half power and the toaster at the same time.