For better or force was I can see them being required on all circuits. It sad how monkey jobs and the rejection of Hubell's patent is leading to these incidents.The CMPs are very proactive on GFCIs even for applications, such as drinking fountains where there was documented issues. I had a proposal accepted for GFCIs 2 cycles ago, for Wind Turbines, there was a requirement for a maint recp in the base of the tower. I pointed out a cord could be use to use power outside. It was accepted.
A lot of this sadly comes from improper work. Which leads me to ask- if people violate code- what guarantees the GFCI will catch it- let along folks will add a GFCIs to begin with.I had energized door handles on a gas station cashiers booth, I wired the booth and car lot, another contractor wired the pumps and controls, and canopy. They used a pvc nipple out to a wireway, they didn't pull a ground and bond it to the panel. They left a stripped #12 off a 20 amp breaker laying against the can. It energized the entire station, pumps and all. A preacher that worked at the car lot next door said "It put the faith in God in him" when he grabbed the door handle!