I think I got a little wordy. The point I make should flow from the fact that AF 447 had no AoA indicator. Pitch and Power is important, no, critical, but if an airliner is anywhere near stall in cruise, something has gone wrong despite instruments. And instruments should not be responsible for nearing the Stall? With AF, the Stall Warn was active at the very beginning of the failure, there was much discussion about whether it was a valid warning or no.