And DSL is much, much shittier than fiber. Good riddance.
I can't speak for the US, but certainly here in he UK there are many places where you can't get cable, even in some parts of the biggest cities, because of a lack of modern infrastructure in listed buildings, etc. I do wonder though how many of the quoted 100 million people actually use their POTS lines, or if they just have one because of ADSL or because the cable company forces it on them. I'm in the latter category, I have a POTS line as part of my cable package because its cheaper than just paying for cable on its own. I don't want it, and it's never even been plugged in, but I'm still part of their phone user statistics.