Loss of Control is the #1 killer of pilots
According to the NTSB installing new technology, such as an AOA indicator, which, when coupled with pilot understanding and training on how best to use it can assist pilots during critical or high workload phases of flight. - NTSB Most Wanted List
Stall speed can change with weight, angle of bank and load factor. But an aircraft always stalls at the same critical Angle of Attack.
Capt. Warren Vandeburg, Chief Instructor at American Airlines discusses how AoA should be installed in all aircraft.