It's not just music, either.
I'm talking about music because I was Close to music, and I watched these things play out in real time through lots of little decisions that seemed like the best idea at the time but that ultimately resulted in even our relatively recent scene being full of Empty Space where music should be.
But it's more than music. I've seen indie films at local festivals that, if you weren't in the room at one of those screenings, you'd never know existed. They're ghosts.