Not a "no brainer" - internet aside, I'm quite happy to have Fusion POTS and a corded phone, for one thing it still works during a power outage (especially for 911). I'm at the dodgy end of the lake in Oakland, and wouldn't expect fiber that soon, but if/when it arrives, is that the end of POTS?
Yes, if/when fiber arrives you can expect copper POTS to be retired shortly thereafter. Power backup is an important point though. We offer small battery backup units that provide either eight or 24 hours of power backup for the on-premise equipment. Residents can also provide site power themselves, for any duration, usinga larger UPS, or integrated solar/batteries (SolarWall etc), or a portable or installed generator.
Also probably worth mentioning that fiber-optic networks are largely passive, so they are generally not dependent upon thousands of cabinets in neighborhoods like a Cable system or Fiber-to-the-node (UVerse) product. With Cable for example, power might be on at your home but your Cable might be out because the battery in the nearby electronics cabinet died after a couple of days. That isn't the same with fiber.
It's been obvious for years that AT&T wants to dump their copper altogether. Rumor has it (from one of their techs) that Sonic might actually take it off their hands. Possible?
No, we would not. Doing so would be buying a buggy whip today. The copper is a very old infrastructure and will clearly be replaced by fiber and wireless over time. We have got to put our efforts and dollars into the future, not the past.