Microwaves, or microwave ovens? Because I can name all sorts of ways that microwaves have improved communications. So many long-haul telco links, and remote radio/TV stations, have been accomplished by microwave. It's a powerful method of transmission.

Unless you're specifically meaning microwave ovens, which are of "limited utility" in a full-service kitchen. I'd have to agree there.

My previous microwave oven was so intensely powerful, that I needed to dial down the power to "7/10" so that it would not destroy my frozen meals. I could never run it at 10/10. My current appliance is very nice, and has an automatic button to run until doneness. Works every time now.