> harsh context break for me. There's no continuity like a book

more than a page turn?

I find the continual swiping distracting. And it's a much more complex motion (akin to a page turn) and must be done more frequently than paing. A tap of the space bar is about the simplest motion, and (except in cases of bad page design) gives a clean "start at top for next page" rather than trying to figure out where on the screen your next line is.

Preferences vary, obviously.