I haven't used my iPad much at all for the last year or more. Not because of screen size. Usage started declining when I got a 6s plus in march 2016. I would go to use it and try to use 3D Touch for something and it spoils the there naturally, so I'd put it down and pick up my iPhone. Even more so now, as the hardware home button feels cheap to me now, it always has to an extent, but now that there is something to compare it to, even more so.