Comment by svat

FWIW the XKCD talk at Google is here (wow, 18 years ago! I remember watching this video when it was posted): https://www.youtube.com/watch?v=zJOS0sV2a24 (Knuth comes up to ask a question at 21:30) (Can't tell from the video where he was sitting otherwise, though there are definitely at least some people sitting on the floor.)