A look back at one influential rock album highlights the connection between age and rock music:

In the mid-1950s, the idea that the cutting edge of pop would come to be dominated by relatively young people writing songs for and about people even younger was a revolutionary notion, one that in the next decade would come to be taken for granted.
How much did the music help encourage youth culture or the youth culture encourage the music? This was a period with a growing number of children and teenagers and a different sense of what youths could do and contribute to society.
It would be interesting to compare that time period to today regarding music. Some of those original influential youths from the 1950s and 1960s music scene are still alive. They continue to make new music as well as play their old hits. They are no longer young; but do they continue to carry on a youthful spark or the youth culture of that time? Or do they not matter much as younger people continue to make, remake, and innovate music.
It is hard to imagine otherwise but imagine the purveyors of rock music in the 1950s and 1960s were not young – not Elvis, Chuck Berry, the Beatles, etc. – but rather musicians in their 30s and 40s. What might be different – the sound? The lyrics? The scene? Would rock music be different today based on those changes back then?