The thing is rock n roll was originally rebellious music for the younger generation but by and large rock has now become respectable with veterans like Paul McCartney and Elton John being made 'Sirs'. How establishment can you get? Most of the 'older' stars are not doing anything new or interesting so why do they go on, especially as they have squillions in the bank and several houses in the choiciest places on the planet. 'Blues' is another matter. often, the older the better.