Remember when it was surprising to learn that someone didn't have a landline phone? The "mobile-only" early adopters were objects of wonder: what if your battery dies? What if you experience a network outage? What if you lose it? Only a decade ago, landlines seemed an essential part of the home. Arranging a room for available electrical outlets and available phone jacks was an ordinary occurrence.
That seems silly now. Roughly half my friends and acquaintances are mobile-only and....