Except that it doesn't actually take a photo - it (slowly) launches the camera app, which you can then use to take a photo. You can long press to begin filming a video, but at least by default it won't actually take a photo to press the shutter. Poster above is correct, it's slow enough that I frequently miss spontaneous pictures on my iPhone 16 Pro - as much because of the terrible recessed design of the shutter button as the software delay.