I just wanted to quote DJRosstar2009's reply to this comment, because he didn't quote you and he makes a good point.
"Wait ... so if a band isn't relevant (popular/mainstream) that automatically means we shouldn't listen to them anymore? That is the definition of being trendy!!
Should I go sell my collection to save up for fun., The Lumineers, Neon Trees and The Black Keys because they sell well!?
I am over Green Day. Mumford & Sons forever."