The book (2003) is one of my favorites. Therefore, I've been tolerant of some of the changes made in the TV series. Two episodes to go. Overall I like it.
I've seen / heard A.B. interview NEA jazz masters at the New Mexico Jazz Festival many times. Thought he was still active. Didn't realize he's 87 years old.
He was using a walker when I saw him, but his "spirits" seemed good. Part of his ambulation problem is due to the amputation he had years ago. He has a partial leg prosthesis.