I use the keep warm feature on my instant pot as an alternative to a microwave. I'm not paranoid about microwaves - I just don't like constantly cleaning them.
So instead install a weight sensor and estimate based on that how long to zap stuff. There has been 0 progress in microwaves for a long time now, while many many easy improvements seem rather obvious to most people.
Personally I'd love for my microwave to have bluetooth so it'd make my phone beep when it's done.
