Apple's e-SIM only approach would have been a good idea if they actually did something with the freed up space rather than put a plastic slab in it that does nothing.,(reply>), Really I doubt they'll do anything about that plastic slab anytime soon since the China market exists and Apple still makes a dual SIM model just for them.  Putting something into that area would mean they would need to have to design a 2nd set of internals for this China market who still want the dual SIM.