Do Great Songs Ever Go Unheard?

I am not talking about good songs, I am talking about great songs.  I know good and great are subjective, but can you point to a song that you said to yourself - “that’s one of the best songs I ever heard in my life” - and then that song went on to die on the shelf…never to be heard by more than a handful of humans again?  Does death by obscurity really happen to great songs, or does lack of traction only happen to mediocre songs?

To learn more, read the great comments on Music Think Tank.