Beyond this, the WEIS design considers another massive feature of the iPhone 17 Air: its skinny profile, which could measure as little as 5.5mm. By contrast, the iPhone 16 is 7.8mm thick. Two other ...
Apple has actually experimented with unified solid-state volume buttons in the past, including on an iPhone 14 Pro prototype, so it's possible the idea is being resurrected for the iPhone 17 series.