Originally Posted by
krismiler
A properly designed aircraft shouldn’t require all these aerodynamic add ons, get it right in the first place and you won’t need to go sticking pieces of metal everywhere.
It is a very rare airplane that doesn't need some fixes here or there. VG, vanes, strakes, fences, leading edge "dog tooth" or droop are very common to provide adequate behavior within the whole flight envelope.
For reasons of their own, Boeing chose the quick-and-dirty software patch way.