Why are we still waiting for J.D. Salinger?

I was a teenager when I first read The Catcher in the Rye, and I remember thinking, quite seriously, that I wanted to be a writer, not in some abstract, romantic way, but with a kind of visceral clarity that made me look at books differently from then on. 

Holden Caulfield's voice felt like it had kicked the door open. It was messy, alive, and full of feeling. It didn’t sound like a book was supposed to sound, and that was precisely the point.