Earlier quoted context omitted.
POTS still has alot of life left in it. It just hasn't seen any investment. Long-term it could handle greater overall capacity given each household has a physically dedicated line to an aggregation point. Phone companies just need to invest in putting the DSL modems closer to the households, say at the neighborhood cabinet rather than the switching station. A literal mile is too far. VDSL2 can do 100Mb/s in each dire…
VDSL2 is great for the areas where most of the customers are already close enough to benefit. But outside of urban areas, you're still proposing almost the same degree of disruption to the neighborhood as a full fiber deployment. Instead of digging up the road and my yard and putting new cables into my house, you're now merely digging up the road and putting new boxes in every fifth yard. And all to offer downstream…
I agree DOCSIS has been good enough. But with the shift to services like Hulu and NetFlix I would argue that it's nearing a threshold. And even if it weren't, I bet if a telephone company had somebody as highly motivated as Elon Musk, they'd be able to eat their local cable company's lunch.