I talked with John today. He's back to burning the candle at both ends, but has slowed down just a bit. (He's not trying to burn it in the middle, too.)
He's back at work at Grady, repairing ambulances, and doing his shop stuff, too. I even have a (small) project that he's working on, when he has the time.
He said that today, he "wasn't going to do anything".
Edit - I got a butt-dial from him a couple of weeks ago, too. His phone has been acting up.