I just object to not being allowed to use the hardware already installed with a provider entirely of my own choice, which would be the most efficient way to run infrastructure businesses.
There's also the cable option, but if you go down that route then you're actually more tied in to a single provider for services than with PSTN/ADSL.
My current house had BT at some point (there's a BT access box in a cupboard, but it's not connected to anything), but it was gone before I moved in - I'm guessing either as a result of some roadworks having cut through the wires or possibly a BT upgrade of their infrastructure, but as the people who lived there before me were on what was Diamond Cable at the time, BT clearly didn't bother doing whatever was involved in rewiring the house back in.