Rock and Roll has gone down hill ever since Buddy Holly died

What really irritates me are people that make statements like: Are The Vines the next Nirvana? Probably not. They may have a similar style, but there is only one Nirvana. Just like there is only one Elvis or one Buddy Holly. And there is only one Beatles, only one Beach Boys and only one Ramones. Those people or bands shaped generations. Sure some people my have different opinions than myself; But as far as I'm concerned after having people like Brittany Spears being in the lime light, music has so gone downhill. In the words of Paul LeMat on American Graffiti Rock and Roll has gone down hill since Buddy Holly Died.
I figure 20 years from now when Rolling Stone Magazine makes another list of 500 Greatest Albums of All Time, people like Brittany Spears, The vines or ‘Nsync will be forgotten.