Love the way he's holding the stick very traditionally with his left hand. "Good old school", and how stabletrain-heavy rocking at that age.A class act and the metronome of the Stones for sure. Like the Beatles, you can't imagine the band without him. I love this clip of him doing All Down the Line. He's still got it but as you see in the end, it takes a lot to do this at 75 or 80.
Keith is actually a giga-tardigrade - very rare: they sacrifice 2 limbs and a couple thousand years life span to achieve their massive size, but they gain an added advantage of being able to metabolize - almost exclusively - all variations of alcohol and a number of drugs without any significant detriments.