While fixing my MacBook Air today, I take a look at all apple iPadOS and iOS devices on sale at the moment, specifically looking for jelly scroll effect. To my surprise, even the most expensive iPhone and iPad (iPhone 14 Pro Max and iPad Pro 12.9" M2) experience jelly scroll effect, but only visible if I concentrate and look at it. iPad Mini otoh, the jelly scroll effect is so obvious many would probably notice it without outright looking for it.
The moral of the story is, jelly scroll effect is visible for all LCD/LED screens as long as they generate picture using the exact same method used back in CRT days: draw pixel one at a time, from top left corner to the top right corner, back to the left end of second line, pixel by pixel until reaching the right end, rinse and repeat until all the images are displayed completely, jelly scroll effect will never go away during scrolling. Funny enough, Apple’s Pro XDR display doesn’t seem to suffer this effect, so does “newer” studio display.
Still, this cannot deny the fact that Apple is indeed cheaping out on iPad mini Display or creating a design that doesn’t fit well for typical iPad mini use case.