It is intresting to see all the different methods used around the country.
The best thing is each method works fine for that area.
I have to ask about this;
Romex is subject to physical damage under 8' unless behind finish.
Is this a local code because it is not in the NEC.
What is in the NEC is 334.15(A)
334.15 Exposed Work.
In exposed work, except as provided in 300.11(A), the cable shall be installed as specified in 334.15(A) through (C).
(A) To Follow Surface. The cable shall closely follow the surface of the building finish or of running boards.
Bob