Well, Lightning (which is older) is already significantly thinner than USB-C, 1.5mm rather than 2.6mm, though it has fewer pins. Looking at this visual compari

Well, Lightning (which is older) is already significantly thinner than USB-C, 1.5mm rather than 2.6mm, though it has fewer pins. Looking at this visual comparison, I'm a little concerned that USB-C will start being too thick if the phone thinness war ever starts up again: http://josh-ua.co/blog/2015/3/15/usb-c-dimensions-size-comparison-with-the-lightning-port-and-usb-type-a http://josh-ua.co/blog/2015/3/15/usb-c-dimensions-size-compa... Lightning also differs in not being hollow on the male side, which, aside from reducing thickness, apparently has both advantages and disadvantages for durability.