I remember way back in the late 90's. You had basically 3 or 4 'types' of radio stations to choose from: classic rock, grunge/alternative, pop rock, R&B/hip hop.
Then at the exclusion of both pop rock and grunge/alternative Britney Spears and Christina Aguilera began getting more and more airplay.. by 2005 rock and roll was all but dead.
I just remembered thinking at the time: who in the hell is clamoring for this shit? It was obvious to me then that there was a power shift in music. I honestly thought the only person that can seriously enjoy this music is a pedophile.