If you put 400 Bevboy's together in one room, and chained them/us to separate typewriters, they/we could still never write as well, or as much, as Mark Evanier. He is a full-time writer. For exercise, for jollies, he maintains this blog, which he updates when he is not doing paying work. Which is still several times a day. Amazing output. And amazingly high quality writing.
He posted this video tonight, and I have to share it with you. You have to check it out.