Because it would require the change of design as Phil supposedly stated. However attaching lightning proboscis and "revolutionising" keyboard by removing key(s) obviously is a piece of cake and a way to go.

Seriously. They do not care about RAM as Pro users clearly do and we feel betrayed. I wonder if and when will anti-touch display stubbornness vanish as it kind of did when they introduced stylus (sorry, Pencil).