[prodigal_erik]

There are diminishing returns. You could easily have eight people each working a one-hour shift on an assembly line once they all know the task, but writing code that way would be absurd--they'd waste almost all the time explaining how they intend to proceed with what they only just started on.

[semiel]

That's a pretty silly strawman. It would obviously be a better idea to work fewer months out of the year, or weeks out of the month, or days out of the week. How long a single session of work is is probably the least important variable.