There are some (very few, rare) scroll-hijackers that work pretty well. This one is not one of them. In fact, the one used on this site is one of the worst. Why

There are some (very few, rare) scroll-hijackers that work pretty well. This one is not one of them. In fact, the one used on this site is one of the worst. Why I say this is its behavior. Instead of smooth scrolls, it seems like there is a certain threshold at which the scroll bar "ticks." They mask this tick by slapping on it a tween animation. So it's a bunch of ticks that result in tween animations. There are beautiful scroll-hijackers that use complicated math to make it an actually smooth experience. This one is neither smooth nor helpful. There are also those scroll-hijackers that are employed to do card/slide/page based interfaces. Those are still awful, much more understandable than this garbage.