B.B King would still say to him, "Those are some mighty heavy lyrics from such a young man!"
I like to think about what his mind is going to come up with when he is really older, like 70 or so. U2 has, for the past 25 years, done away with many of the conventions of rock that had been established before. Performing and writing rock music in your 70's may be another one.
That was something I was looking forward to with so many other's like John Lennon. Maybe U2 will be the ones to do it. Should be interesting if they do. Bono zipping around the stage in a motorized wheelchair! Anyway, I'll bet his words and wisdom on old-age things will be really great.
And some are saying NO WAY do we want old rockers! And I say "Why not?" Why only old bluesman? I think the form of rock can accomodate old age. And I'm not talking about concerts only by old men. I'm talking great new music, new albums, new ideas.