I'm baffled by your comment. I specifically recall getting some new Samsungs at work two years ago, so I got one to play with for a little. I was shocked by how janky scrolling felt. Just going through the android settings screen, there were "hiccups" and there was a clear lag between my finger moving and the screen moving. My iphone 7 felt so much smoother, although much older and "crufty", as opposed to the Samsung being brand new and "untouched". It was a then-current mid-range model, don't remember which one specifically.