This post by Voyeur lead me on to the following thoughts.
How old were the guys at the time they created all their hits which are still so popular? Around 25 years.
How many bands (with members of the same age) that have a comparable number of hits which people will still remember and sing 40 years later could we count today?
Will the time when we see so many great bands like The Beatles, The Rolling Stones or CCR ever repeat?