We have been 45+ years married and keeping house, without ever having a microwave. The only time I've ever used one was when I was in an office that had one, as suggested above, to reheat coffee that had gone cold. And the reheated coffee was still garbage, just hot garbage.

I suspect if we had one of any significant size, one of our whacky cats would find a way to get inside and turn it on. And the cleaning problems would be awful.

P.