I have to pile onto the criticism of the hidden scroll bars, and other similar features (like the hidden buttons of PDF viewers now, such as in Chrome). Discoverability is a problem. For anyone (cough, elderly parents) who aren't adept at discovering hidden features, these things can be utterly mind-boggling and frustrating. Even I was stumped for a good minute the first time trying to print/save/download a PDF when…
Scroll bars weren't really "hidden", though; they were obviated. At least on macOS, all the mouse-like input peripherals that Apple will sell you (both the Magic Mouse and Magic Trackpad), and all the inputs for their laptops, have two-finger "natural" scrolling. Apple seems to expect/assume that you've scrolled a touchscreen at some point in your life (in fact, many people have scrolled more touchscreens than deskto…
We had scrollbars on 640x480 both ways and liked it. Even SGIs with 1280x1024 monitors had scrollbars, and it wasn't a burden that some folks today seem to think it was.