Music has branched out into so many different forms now. It's been evolving. If you're unaware of the many revolutions in music since the 60's you're simply looking in the wrong place.
Radio is corrupted, along with MTV. It seems like most people primarily get their tunes from these retarded sources. There is a huge wealth of excellent music made since the freaking 70's!!

consider that raw musical technology has been improving. a metal band from the 70's draws from the bands that came before it.
a metal band from 2000 would have 30+ years of musical resource to draw from!!

of course, certain bands like the beatles are certain classics. You cant defeat pure creative genius with electronics. but consider..if this superior technology was given to a creative genius.

If you're not evolving
you're decaying.