[bob1029]

Serialized execution flow and large work batches seem to be just as good for humans as for machines.

Context switching is expensive in any domain once you look at it from an information theory perspective. Communication of the information almost always costs more than computation over the information. Large batches solve this.

If I'm in my kitchen and I've got everything I need to make 2 lbs of taco meat, I also have nearly everything I need to make 4 lbs. From a process perspective it's identical. The additional amount of time required is sub-linear in this situation. There's probably enough capacity for 6-7 lbs before I saturate the capabilities of my residential equipment.