Re: The reality is that it's happening now
My router does have a POTS socket. It also does VOIP over the LAN. But I have more than one POTS device to plug into it - including the alarm system which is an issue I haven't sorted. If ADT do offer a digital solution it will cost. And when there is a power cut its Christmas for any burglars.
I.m thinking of investing in the small UPS market. Or filling a warehouse with 'em come 2024 ;-)