I don't really believe in this generalization, but I was struck recently by how a local "classic rock" station is playing the same songs as they did 30 years ag

I don't really believe in this generalization, but I was struck recently by how a local "classic rock" station is playing the same songs as they did 30 years ago. You'd think that "classic" would have advanced by a few decades. But come on, is your claim really supported by Tom Brady being 42 and not 38? Or by the falling US life expectancy? Or by social security retirement age changing from 65 to 67?