As i see it, usual scrolljacking implementations give the illusion of a more immersive experience with the following tradeoffs over clicking navigation:
- interferes with the inherent perception of what the scroll does (moving a page up/down)
- harder to navigate (you have to scroll a lot to trigger a section change)
- harder to understand how much more is left to see
- harder to implement and to debug potential bugs
- needs a menu to mitigate all of the above (defeating the purpose of scrolling)
and probably more stuff that i can't think of right now