He was once married to bipolar Carrie Fisher. That could’ve taken a toll on him.
I think Paul Simon is still married to Edie Brickell. They got into a domestic brawl a couple of years ago that resulted in both of them being arrested and charged with disorderly conduct. Maybe he is a boozer.
His song Graceland was about his split up with Carrie. One his best most heart wrenching songs.