I was just looking at a picture of the experimental X-31 jet at high AoA and the canard was pretty close to horizontal. I suppose they want the canard to keep flying, for control, whatever else is going on.

Doing the same thing in RC might not be practical. Those fly-by-wire jets have the big multiple computers constantly evaluating what exactly each surface needs to be doing. Also, the airframes are not stabile like RC models: the computers make them flyable.