I think the lack of scroll bar goes with an assumption of a trackpad. It also gets rid of most of the context clues that a page goes off the screen or how long

I think the lack of scroll bar goes with an assumption of a trackpad. It also gets rid of most of the context clues that a page goes off the screen or how long a page is. Without a trackpad (ignoring search), it's really difficult to scroll through a very long document or log.