Are those wires really 80 years old though? [1] (just the abstract) suggests overhead wires need replacement after 50 years. In any case,
towns in Europe were electrified at a similar time to America. (Rural areas probably aren't comparable, with the bigger distances in the US being the reason Europe was first for this.)
[1] http://ieeexplore.ieee.org/document/595590/?reload=true