Yes they changed ours (the whole local area in fact), even though it was quite clear (no crackles or unhealthy noises) and didn't seem to be faulty in anyway (I was 15 years old then, though I'd love to say I hadn't been born at the time!).
Of course, it was a different time then - money and profits seem to be above all else nowadays (worse than some 20-30 years back)
Well that is quite different from one individual line being changed.
Naturally I'd like for the line to be replaced,but if it is not I will leave talktalk. I called to leave anyway. I'd much rather have left but they were so diplomatic how could I not accept. I also leave free of charge as my time with talktalk comes to an end. So new line or not I consider it a win. And yet I feel I am being somewhat loyal in extending my patience for something to be done about it. It's a rocky relationship, one I hope doesn't end in divorce.
Is this bit of greenery affecting your telephone service too ?
That's the first thing to ascertain.
If, as you say, your stats are fine then the buffering issues are due to lack of throughput, which would indicate a device, router or network issue.
If you are actually getting intermittent disconnections, that COULD be due to an old line, corrosion in joints or sockets etc.
One member recently had issues due to damp spiders webs in an external connection box on his home.
The engineer will just be to check that everything is OK and working correctly, they wont carry out any repair work unless there is a fault that requires remedial action.
I'm just not certain why the openreach guy is coming around. I have an email saying when my services will go live and a new router will arrive. I have the services already and I have the new router. Not sure what it's all about. I asked for a new line that's all. Think there is a mix up somewhere. I'm getting welcome to talktalk letters through the door whilst having talktalk for months n months.