"You have to balance Stall Warnings in extremely rare events with far more common nuisance stall warnings, in order to maintain confidence in the system"
With an AOA probe/indicators system set up to alarm CONTINUOUSLY anytime AOA reaches predetermined level before critical AOA and BEYOND (...sorry sound like Buzz Lightyear) with the addition of a weight on wheels breaker.
Can you envisage any scenario which would lead to a "Nuisance stall warning"?
PS.-- One interesting post few pages back was from a captain who made the point that sometimes having an alarm going of continuously can detract from an individuals ability to deal with a problem. I suspect there is a balance that has to be struck and I suspect / hope that the engineers, psychologists, pilots involved in cockpit design have already thought it through.