[johannes1234321]

I guess there are three things he does while working:

* Thinking About maths problems (incl. writing them down, solving) * Teaching students * Discussing problems with researchers.

The first thing he could probably do at home, but having a dedicated thinking place may help. The others are hard to do at home in the same quality for many reasons.

[lanstin]

IIRC he gets into his work arrangement to try to finish TAOCP:

https://www.youtube.com/watch?v=2BdBfsXbST8&ab_channel=LexFr...

I don't really like Lex Fridman, but this interview is excellent.