It's a sad article for me.The very first bluegrass concert I saw was Doyle Lawson,J D Crowe and the new south and the Tony Rice Unit in Lawrence Ks around 1990 or 91. They did a Bluegrass Album band reunion with the Simpkins brothers on bass and fiddle. I really did now know what I was witnessing at the time. I remember Tony broke a string,went back behind the curtain to change it,and when he came back out he was blowing smoke. Nobody wants to talk about it,but it's the tobacco that's taken his voice,that and other stuff. You can't abuse yourself for 50 yrs and get away with it.Take a listen to Paul Williams if you don't believe me. He's been known to sing above his range a time or two.
Don't think I'm passing judgement,I smoked for 35 yrs myself.It's a hard thing to get away from.