In our case, the AT&T tech found that our line pair was not in use by anyone else down the block and was able to give us sort of a dedicated run to the RT box that was less than 2 blocks away. I believe he also did some work at the box that *may* have helped as well. May have just cut, and re-made the connection on that end. Spent some time in his bucket fiddling with the wire bundle at the pole. Unfortunately, a neighbor's line broke free (due to corrosion) almost the instant he went up there so he also had to fix their line as well.
When we first got Sonic (which is no longer available here for new installs), the AT&T tech spent some time rewiring, answering all my questions and cleaning the lines up so we could get the best signal. I asked for his manager's info so I could give him a very positive review of his employee. I tried a number of times to get through to the manager, finally leaving a message about his employee. Never heard back. Over a year later I saw the same technician working nearby and asked if his last review noted my call. He said no, and they just focused on a couple minor complaints, the details of which sounded so questionable to me that I suspect they were just looking for something to prevent a pay increase.
A friend who works at AT&T on their industrial fiber connections describes how their work tracking system will occasionally go haywire and hundreds of closed tickets reappear as if they were new jobs. It takes them a while to sort this out, which backs up the real work that needs to get done. This seems to occur when someone outside their division pushes software updates to their database. Their team manager has directly requested that either they NOT do the updates as they are using a closed system and are not needed, or give advance notice before the updates are performed so they don't waste half a day playing detective. Neither request has been heeded and the updates and chaos continue.
Once, I asked him about our area which is surrounded by AT&T 1 gig fiber lines, yet the few block radius in the center is on rotting lines that can only offer 1.5 mbps DSL (despite my own 6 mbps line with Sonic). The area was all developed around the same time and the non-fiber areas are on flat, grid streets. I noticed that the surrounding streets climbing the hills all pretty much have fiber runs, despite there only being houses on ONE side of the street, with wider lots. In other words, the hill streets have less than half the potential customers as the flat section were we are with houses on both sides, with narrow lots on the street side so there is a high concentration of potential customers (at least 4 per connection point). My friend simply cut me off and said, "You are trying to think about this logically. That doesn't work with AT&T."
Based on multiple things I have heard in recent years (from uninformed observers to those who work within AT&T), the executive level would rather ignore the copper lines as much as possible. While there are some degradation issues that may add costs, there is a reality that in many cases AT&T management would be happy to let those lines rot while charging us higher rates to "maintain" them, whatever that means.
As a side note, AT&T benefited massively from the 2017 tax cut (as in billions) and continues to. After lobbying heavily for the tax change and promising thousands of new American jobs, they have instead done waves of layoffs while posting profits. So, good for them. *sigh*
OK... I appear to have hijacked your problem-solving thread. Sorry about that.