All he cares about is going out there with his Jack Daniels bottle. Nothing has changed. That's kind of sad. If David was doing better than he used to be then that would be different. But it was a joke and he made it that way.
It's part of the calling to at least do a few songs in the show that give people some hope. There's so much hurt in this world and... music is such a great healing balm and a great way to forget your troubles.