I think you're right. They then quickly learned that it's in their best interest to have a sealed system. Makes it cheaper to obtain higher IP ratings. Sells more devices. It obviously did nothing that hurt sales. Samsung is making an IP68 rated device with replaceable battery and still takes SD cards right now. It's only $600 to boot making it handedly cheaper than flagships. So why isn't it what everyone's pointing at in these threads? Cause the majority of people, even in these very threads, aren't buying it. These are not the factors that decided buying a phone. Otherwise removable batteries, SD cards and 3.5mm jacks would still be ubiquitous, but here we are.