Since the event yesterday I've been thinking about how these new models play out with Apple's history of selling the older phones at a discount for two years. The X was replaced by the Xs and is no longer for sale. I wonder if this trend will continue with only the Xr line remaining for sale for the following years. It would mean producing half the number of models of older iPhones going forward. Instead of 7, 7 plus, 8, 8 plus they would only have Xr and Xr 2019 replacement two years from now. Would this save them a significant amount of money?