Could we be heroes for just one day?

Why is it that all the good songs have to come from the 80's? And why is it cool to listen to vinyl? If we use the hypothesis that songs 20 years in the past are always cooler than the current ones, does it mean that in 2020 Katy Perry would be awesome and Imagine Dragons are the songs u listen to when you're high or kids then would loose their virginity to Bruno Mars?

Or is the main rule is that it must not be mainstream? Anything that u cannot find on air or on the top 40 hits? Only when u listen to some wrist slitting lyrics from some obscure band from Idaho that your taste in music will suddenly be defined as "good"?
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A quote from my movie of the moment:

Because I know there are people who say all these things don't happen. And there are people who forget what it's like to be 16 when they turn 17. I know these will all be stories someday. And our pictures will become old photographs. We'll all become somebody's mom or dad. But right now these moments are not stories. This is happening, I am here and I am looking at her. And she is so beautiful. I can see it. This one moment when you know you're not a sad story. You are alive, and you stand up and see the lights on the buildings and everything that makes you wonder. And you're listening to that song and that drive with the people you love most in this world. And in this moment I swear, we are infinite.