Earlier quoted context omitted.
That's not true in my experience. I also participated in such an "experiment" and I'm normally the one with more endurance and speed, able to do overtime, or work on personal projects after hours. In my experience, with daily pairing, both workers felt completely drained of energy after 4 hours (including pauses). Pairing a couple hours a day, or a couple times a week is alright, and very productive. Doing it 5 days…
https://news.ycombinator.com/item?id=27082522 - this guy is cut out for Extreme Programming. If something is good, why not have it all the time, right? We mortals, are likely more suitable for moderate programming, with infrequent informal pairing when necessary.
Having the same supper feels more of a way to avoid stress, to avoid making multiple decisions daily, to have some grounding in your life, to have less risk. Similar to Steve Jobs wearing the same uniform everyday to work. [1]
As said in other post in this thread, by Cthulhu_, part of the appeal of pairing is "getting out of your comfort zone". I don't think this guy wants to be out of his comfort zone for 8 hours a day.
If he were a coder, maybe "stability" would be working solo. Maybe he would have liked 8hrs/day pairing. Maybe he'd prefer start his coding around 6:00 and going home after lunch. No way of knowing.
[1] https://www.forbes.com/sites/jacquelynsmith/2012/10/05/steve...