I guess I won’t get of rid of the copper line quite yet ;-)
We dumped AT&T a couple years ago when they simply wouldn’t keep our ADSL running reliably. Bandwidth regularly dropped to 128 kbps, what I got out of my US Robotics modem 20 years ago. I ripped out the copper pair drop from the pole to the house after AT&T refused to do it because (drum roll!!) I was no longer a customer! I don’t think you could pay me enough to go back to AT&T for ANY flavor of DSL. They lost me as a. Ustomer forever.