Fairphone 6, recent with replaceable battery: 9.6 mm
Galaxy S5, has a replaceable battery, released _12 years ago_ - battery tech has improved a lot since then: 8.1 mm
iPhone 17 Pro Max: 8.8 mm
iPhone 12 Pro Max: 7.4 mm
We want to make phones as thin as possible so the latest flagship iPhone is 1.4 mm thicker than the one from 5 years ago? A whole 0.8 mm thinner than a recent one with a replaceable battery with maybe 0.1% of the iPhone's R&D budget, and 0.8 mm thicker than one with a replaceable battery made 12 years ago?