I also agree and I am fascinated with what MoparJohn is discovering here with the comparisons of sibling parts where as one is down on weight from another that is the same in shape/form and function.
Well maybe, since a lot of car models are being dried up over the years, the next incoming generation of models (C-Body) (F-Body) (M-Body)will take note and begin their own weight loss push and end up pushing us out of the game.
Keep your eyes peeled for the Goliath that poses as a damsel in distress. They just might be pull a sly one over us.