I cant even remember open air wires, we don't have that here any more aside for the largest Kvolt transmission lines.
My childhood neighborhood did have the street light that way with the lamps suspended on wires, and the power was on a unshielded wire from pole to pole.
But i cant remember when it was changed but properly when i was like 15 or so, cuz later on when we was drunk it was popular to climb up the same old masts and sit on the top and sway back and forth, and it was not electrocution that was the biggest danger to us then.