Too much is made of the super shoes. Yes, they are responsible for the tsunami of faster times. However, it just doesn't matter, Quit yer bitchin!
The move off of cinders improved times. The move away from wool clothes improved times. The move away from leather shoes improved times. The move from away amateurism improved times. Better nutrition improved times.
Technological advancement has, and always will, improve performance. The only thing that happens is...times that were once considered good become pedestrian over time.
Anyone who pays attention knows that a sub-4 on a modern track with super shoes isn't the same accomplishment as running sub-4, 30 years ago, just like running sub-4, 30 years ago wasn't the same accomplishment as running sub-4 in 1954.
So, the shoes make more high school kids go sub-4, so what.