Alright, other vendor provide an option to have or not to have discrete GPU. Can you change it once a better GPU is available? Can other laptop vendor swap out their display with a touch capable one when needed? (As of now, framework doesn't have a touchscreen available yet, but IIRC, their board has the capabilities, but then again, their board is so modular that they can offer upgrade for trade-in). Can other vendor have bigger battery when you wanted the bigger battery without affecting other hardware choices? Framework batteries in the 13 series are improved purely by better chemistry. You can replace it with the bigger capacity one.

Edit: also, they are still a new company. Their hope is that 3rd party vendor is interested in making other modular part. The trackpad is a good example of it. It also can make some patented design available to the framework if the patent holder willing to make the accessory without giving up or licensing their patent.