a lot of people seem to get this wrong so let me reiterate: whether a phone has removable battery or headphone jack, etc. or not has almost zero relations to its thickness, waterproofing, etc. it's simply a choice that manufacturers made. they know how to make it fit into their devices, they just don't wanna try. of course there will be non-zero costs involved but so is shoving in multiple cameras, motorized parts or even a fragile folding display with a water-resistant hinge. again, it's not even something they haven't tried before, and they know it. every manufacturers mocked apple for removing the headphone jack before doing it themselves because selling wireless earbuds was more profitable than saving their face.