If, without this device, it is very easy to reach a dangerously high angle-of-attack in turns, then it is beginning to look more like a necessary feature (at least from a certification point of view), which would raise additional questions about why such an important device is so vulnerable to sensor failure. It would also tend to heighten suspicions that Boeing has not been entirely forthright about the device's purpose, capabilities, risk if malfunctioning, and why it is being used in this model of aircraft. Could Boeing have downplayed its importance in order to simplify certification and training, or was all this made clear at the time?