Just saw Willie recently, and he's still kickin' ass on that guitar.
I missed out on tickets to see B.B. several years ago in Anchorage. Then I heard from a friend of a friend that he knew the owners of a local Blues club well, and would most likely show up after the concert.
I got there an hour before the concert ended, and got a table right next to the stage. Sure enough about 1 1/2 hrs. later he and the band showed up. He played for 2 hours about 8' away from me.