The author, David Dalrymple, used to be a “wunderkind” (got into MIT phd program when he was 14, etc), but lately he disappeared after briefly working for Twitt

The author, David Dalrymple, used to be a “wunderkind” (got into MIT phd program when he was 14, etc), but lately he disappeared after briefly working for Twitter. I wonder what is he doing now.