The man's 63? My God, isn't that so incredibly old! How can he be expected even to walk, let alone actually sing?...

My impression around folk music is that 63 is the age when a lot of singers are just getting into their stride, and sounding better than ever.
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I love that way you put it LH, though: "...that glorious sense of unpredictability that is typical of Dylan." And I'm not speaking ironically there, because as well as being a great way of gracefully recognising the way his voice slips out of control sometimes, it is true that, with Dylan, he's been able to make use of this creatively. Rather in the way Fred Astaire could incorporate what in other people would have been falls and staggers into his dancing, Bob Dylan can do the equivalent of that vocally. Sometimes anyway.

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Surely this thread heading ought to have been: "We're off to see the Dylan"