At any rate, here's an ideal opening for local amendments to simply say: "No Romex in metal framing."

That's a good idea, functionally, but financially doesn't that add significant cost? I assume AC/MC/BX whatever would be the alternative, which is more expensive and problematic to use with plastic boxes.

I agree though, Romex and metal steel studs just seem...wrong. I did a walk through with a senior inspector one afternoon last summer and it was weird seeing all that yellow wire snaking through a metal stud wall.