I've been doing Commercial,Industrial, and Heavy Industrial all my life.
I wired a few Customs 4K plus (Favors). I just read chpt.3 the night before
and just thought of the house as a large office space. Lobby= living room,
break room=kitchen, office= bedrooms,etc.With no accessible ceiling tiles.
After wiring my first house I couldn't believe how easy commercial was
(Physically),compared to a house. When I was trimming out 200 plugs
I couldn't help but think this sure beats hooking up 300 lay-ins on a ladder
all day.
Regarding the OP's question. I always made up all my boxes at rough.
Having to strip the sheathing,make joints,then install the device on 200
plugs would have been a real PITA.
For the guys that can do a house in a day I wonder how much time is spent
on "Punch" "hot-check" and other words to describe turning on the power
and metering all the circuits and devices to make sure everything works.