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).

This is LPDDR vs. DDR RAM types. There was no intel processor that supported LPDDR4 during the MBP design.

If you wanted to add 32G in a laptop, then DDR4 and reduced battery life are your only options.

A good example is the XPS 15, which trades battery life for DDR4.