Valid points indeed, and I do know of others who have had challenges with analog/DSL copper line service, too. My experience here over the last 34 years has been stellar. I may have had my DSL (from Pac Bell, AT&T, or Sonic) go out for a few hours total since 1999, but I do not remember when it may have last happened. My voice service from the above providers has not gone out at all in 34 years that I can remember. All of this factors into my frequent "Should I maybe find a nicer/bigger house?" thoughts, too.
Also, keep in mind that the reliability of the old POTS services came about because there were no "active" components on the line between you and the Central Office which has a very robust power system. Most of the newer IP-based services do have "active" components that require power in the field beyond the Central Office such as cable system amplifiers or DSL Remote DSLAM's. Power failures in the field are the primary reason that VoIP services have a less-than-stellar reliability issue.
However, with the various flavors of PON (Passive Optical Network) fiber networks, there are no requirements for field power, thus a return to a very reliable network is attained. Additionally, the non-metallic nature of fiber increases its reliability over the old copper wires that are subject to rain intrusion. The only things that stand in the way of the reliability of the fiber network are the same things that affect the copper network such as vandalism, a BIF (Backhoe Induced Failure) or other mechanical disruptions of the network due to storms or traffic accidents.
I have finally given up on my copper lines and, instead, have VoIP lines that are very reliable until one of my internet connections goes down for one of the above reasons (I don't yet have fiber available to me).
Bill