Today, you can listen to Rap (contemporary) or you can listen to Motown classics, or the Beatles, or Led Zeppelin, etc. Sure, it's 40 years old, but who cares?
Truthfully, I think it's odd that music has become somewhat stagnant and that many kids today listen to the music of their grandparents because nothing better seems to have come along lately.
I am a lifelong record collector of many genres of music and have recordings going back over 100 years. Every generation adapts its own style of music, to the horror of their parents and the derision of their children. I think at least 90% of most music is schlock that deserves to be forgotten. However, some modern forms of noise in the last 30 years are so far removed from musicality that all of it should be forgotten.