An adolescent artform?

I worry about rock. Its front edge of development seems to always belong to the youth. As each generation gets older it tends to carry its music with them and not necessarily blend into a larger rock repertory. Young people today listen to early rock some but it is probably more out of the nostalgia of their parents rather than their own interest. But the inverse doesn't seem to be true. I don't see older rockers listening much to the newly emerging styles catered to by our youngest listeners. If rock constantly spins out its new styles to reflect young attitudes and needs will the musc always reflect an adolescent tone? I suppose growing stale is the alternative? Not many young people listen to classical music so I guess staying forever young may not be so bad.