Will Fly, I agree that his voice isn't what it used to be, and he age is a matter of fact.
But the people who go and see him go because they think that he's great and they would still go if he sounded like a frog's chorus. If we don't like the way that he sounds then we don't have to buy a ticket or buy his music.
As it is, however he does it, he gives a lot of pleasure to a lot of people and who's to say that's wrong.

K/van