He's one of my favorite people to follow on Twitter [1] because of this; he regularly tweets about stuff he's learning, especially new languages. It's quite inspiring and uplifting to see a such a figure in the industry still make time to learn on his own and candidly share his thoughts.
I agree. It is quite charming to hear him point quite precisely to the qualities that makes him fond of Haskell, but then struggle to put words to the strengths of Scheme.
