Just caught about 5 minutes of Tyler on Jay Leno a couple nights back. He's such an odd guy. Seems smart and witty, able to think on his feet. But man, that rock star life - especially coming out of the 60's and forward well through the 80's - was a ticket to immorality disguised as immortality.
I'm not surprised by this at all. Rockstars get old just like the rest of us. When one has lived a life as decadent as Steven Tyler, one has many things upon which to reflect in old age.