[daleharvey]

A lot of people cannot, or dont feel like they can rely on a phone:

Various functions including maps will die if your phone goes offline, your phone will chew through your battery even in situations where you really need it for one purpose, general purpose apps like google maps will work well enough until they put you to the top of a mountain without cell reception.

These are all fairly easily solvable UX problems, users with enough knowledge can solve them but that to me is still a failure of technology.