At the end of the chapter devoted to Donald E. Knuth, the authors quote Don Knuth as saying:
I do one thing at a time. This is what computer scientists call batch processing---the alternative is swapping in and out. I do not swap in and out.This quote reminded me a TED talk, in which Italian designer Paolo Cardini encourages his audience to consider the virtues of monotasking.
For several years in my career, I was largely a monotasking person. In my research, I mostly worked on one thing at the time. However, this has changed substantially over the years. Now I find myself multitasking and context switching a lot and this leads to more stress at work. I guess that most of us have a similar story to tell; the length of the list of things to do increases much faster than our ability to get things done, alas.