I was trained with metal boxes, even in residential. We'd pigtail an EGC to a green screw, crimp it down with a PT-70M barrel crimp, and strategically place the sharp pointy mess in an unused corner of the box.
Very labor intensive.
Just mounting the box plumb and square required drilling recesses for the jutting screws on the box sides. Only then would we finally nail the box to the stud.
Remove the unused loom clamp to save on wire count, and we used CXW's (3 1/2" deep) unless at the end of a run.
BTW we NEVER used #14 wire, even on 15A protected lighting circuits.
Metal staples were the only thing available at the time, I've since been able to somewhat aquire plastic cable straps, which a far superior. (Specially stocked for Musser Electric and Kelly Electric, the two past apprentices of my old boss.)
I use plastic Carlon boxes now, and I'll use PVC every time the situation permits. Less bonding /grounding issues to worry about.
Bill has me almost convinced to use #14 wire on my next rough in...appropriately, of course. But I digress again...
