Two other data points: I had the note 9, and the button wasn't customizable (you could disable the app and tweak some other things to keep the button from doing anything, but you couldn't remap it, that was new in the note 10.) And having upgraded to the S24 ultra... there's no button any more, just power + volume. (As shipped, the power button does some bixby nonsense, but it's a couple of clicks to make it do power again, and camera on double-click, like it did on all of the previous models.)