Microwave UIs suck.
Had one with a pure electronic keypad switch on spontaneously and cause a fire once in an RV owing to line noise when I was connecting the power (didn't realize the breaker was on).
Do you know how hard it is to find a microwave with a physical on/off switch now?
Very little technology actually works. If it did, people wouldn't crave new technology.
Regarding smart phones... Occasionally my son visits. He has always prided himself in keeping up with the latest tech. His current "smart phone" actually bends. When we go out together we often need to know something simple, like "what is the address of a pizza place near here" or "does Walmart have xxxx in stock", or "is Jurassic World sold out" we ask him to look it up on his "smart phone". Every time - every single stinkin' time - he fools and fools with it, then announces he either "can't get the info" or "the signal isn't good enough" or some other lame excuse. He's working on a PhD in Photonics, so I don't think the problem lies with his ability to operate the tech.
Try to talk to him on the thing and we might be able to understand him. Or maybe not. Virtually every cell phone conversation is interspersed with - if not entirely composed of - "please repeat that, you're breaking up".
The folks who make portable electronic devices - Microsoft only being the latest - all fail to grasp that the "to work" option is a necessary evil in their designs.
Google is no different - their attention to quality has been lacking since they started, and they've been as predatory as Microsoft is becoming all along. Their definition of a search is "turn up some interesting distractions" and oh by the way, now sell the info about what you searched for.