In 447's case, re: the STALL followed by PF's NU, a very good question. One assumes the WARNING will off if the AoA reduces, so PF's input of NU "REDUCED" AoA?
I was not being facetious about the lack of a shaker/pusher?
By what fortunate waiver come they by this? Because,,,,,,,,etc.
Would it be expensive to refit shaker pusher on this family of a/c?
That would be, Yes.