This is the biggest reason why I'm not against this tech. When I was a kid I was almost always within reach of a wired phone: at school they had a phone explicitly available for kids to use, and while out and about I was almost always in reach of a pay phone. Even if I had no cash I occasionally would call collect.

These days, the network of wired phones that I relied on is mostly gone. My kids aren't quite old enough to roam far enough for it to matter, but soon they will be, and a smart watch (with a limited set of contacts and no distracting features) currently seems like our best bet in the absence of the strong wired phone network that my parents relied on.