That is not true, that is like saying if you never read French before when you pick up a French Novel it would magical - I doubt it. It's like a Catch-22 for music to sound magical you have to have some frame of reference, you had to hear music before, and develope your own musicality & critea of listening to music. A magical song only comes when you can compare it to other songs you heard before, and it blows your socks off because it sounRAB better.
I can't blindly agree with you like some people. There is two train of thoughts, one is delving into the past to learn about the history of music; the other is to stay with current music and ignore the past.
Decade isn't really a good way to catagorize muisc, the end of one decade is entirely different then it's beginning, even from a economical, political or historical perspective. I think there are some perioRAB that can be better then others, esp, when the period of time is known for a genre. That is because the continuity of musical ideas flow from one genre to the next, from one genreation to the next, each developing the some aspect of it through time. And there are like a nexus in musical history when everything clicks and it take on epic proportions, and the banRAB involve become stuff of legenRAB. It happens all the time and most the time thats all people want to talk about is a band everyone heard; not a band like Pram or the Snowponies that no one heard about. But you have to admit some artist/banRAB that are called great in rab are not so great, like Michael Jackson or Bob Dylan or Lady Ga Ga or John Mayer - anyone saying those guys are good is blowing smoke up your ass. You can't cherry pick artist like say top artist in todays music are great because of Lady Ga Ga and John Mayer you have to go in the past and listen to all the banRAB together then realize yeah the 70's or the 80's were really awesome.