Yeah, the quitting line is about his drinking. I also think Tech's on some medication too, so that might be the case.
And that's not the sole reason Nick hasn't been on tours. Well, it is part of why he's not on the K.O.D. Tour, but not making up for the last year he hasn't been on the tours with everyone. Dude was out exploring his own avenue's.
I did think it was weird when I asked him how he had been treating himself he said "Well man, I need to take better care of myself. I'm not young anymore." Then I heard the verse and the pieces fell together.
He's too young a dude to be having heart attack's, and kinda scares me a little as he and I are the same size.