I think there have been discussion about mandating failsafe shutdown of the motor, we already have this with the turbine regulations. This is not an autopilot, and not a demand for PCM.

Technically, there are ways to add this failsafe to a PPM system with an add on box or a new kind of throttle servo. And yes this would cause people to have to spend money. And yes I think it is a good idea, at least on larger models (like over a 40 size.) Read the news.