said by nickphx:
Unless they're charging you for this, why does it matter? I imagine wire quality has gotten better in the last 20 years.
Exactly what I was thinking, and after 20 years. I say it may be good to run a new main line anyway's. As anon said above, if they aren't charging you to do this, then really you shouldn't care, and be happy you will have a new main line.