As usual the NFPA gets pressured by manufacturers to make code accommodations for devices that do not even exist yet.
I remember several years ago that IAEA had a scathing article in the magazine condemning switches and other equipment that were powered through the load (like 2 wire timers and occupancy sensors).
I figured it would just be a matter of time before they put a stop to that. This is the first step. In 50 years, most houses will have an available neutral.
I would have been 117 years old