I’ll throw in the New Zealand company that found its workers became more productive when it moved to a 4 day/30 hour workweek.
https://www.4dayweek.co.nz/blog/the-business-case-for-the-four-day-week
http://fortune.com/2019/02/20/four-day-work-week-research-benefits/
@Nrdsb4 I’m sitting here at home because I decided this morning that it was going to be much too nice of a day to go to work even though the school could have used me - albeit not in one of my specialty classes (so very little draw for me). I might be deluding myself to think I’m still Type B.
I’ve been alternating puttering outside, inside, and on the computer - getting a wee bit done, but mostly just enjoying myself. I’m about to contemplate lunch and it will likely be a couple of fried eggs (from our chickens) and sauteed veggies - 'cause that’s easy. 
Type A- H is down at FIL’s cottage helping him reroof a boathouse. I suspect he’s enjoying the change of routine even though it’s still far more work than I’ve been doing.
@Nrdsb4 Forgot to add. I have the same concerns with my med school lad. He’s been raised solidly Type B or B+ and is in a Type A world for a bit. I wonder what he’ll choose to do/where to go when he gets to make his own decisions. He’s used to traveling and living off our own schedule - plenty of family time with both mom and dad, etc. Time will tell. He knows what the job requires, I made sure of that before he headed that direction. He tells me, “it’s not work if you love what you’re doing.” More power to him. It’s helpful having a medical lad in the family, so there’s that plus.
“Don’t want to review docs necessarily on NYC or Chicago trains during rush hour”
You seem to be referring to the El in Chicago. The commuter trains are very nice and very conducive to working during rush hour. Most people do.