> but a single gesture to get to the top or bottom of a doc or page is extremely handy instead of finding the scroll bar and holding down the button as the window pages, or just mashing the down-arrow.

Home/End on macOS typically jump to the start and end of a document - which annoys me as I prefer Home/End to jump to the beginning and end of the current line - I just don’t like Ctrl+ArrowKeys, and the Cmd-key tires my pinky. At least macOS let’s you remap Cmd/Ctrl/Alt - I wish Windows would do the same.