Geez, if arthritis/rheumatism haven't hampered him by 81, I think he's good to go until the end. His digital dexterity -- @ both hands -- is very fluid, quite impressive for a player half (well, maybe a bit more than half) his age.
But then, the late & great Les Paul remained quite the fluid player until the end, which in his case was age 90 (or older?)...