Frank Szabo
Veteran
A guy I know in capacity planning at one airline says they're lamenting the decision to dump the 757 in favor of cheaper 321s. They just don't have the same mission capability, and the service life is clearly going to be 5-9 years shorter than the Boeings...
Not sure re: the "why" part, but the 300s American had seemed stiff and because of that were quite prone to cracking especially in the gas tanks, coupled with the issue of material inferiority - ie, European Aluminum -, that made for a junky aircraft.
If our Centrepork infestation really wants to do this because the numbers are "right" (rather than simply toying with Boeing for some reason), let 'em. The overtime will be great guns for a while and new fixturing (my area) will be needed.