> These patterns probably seem obvious to us as power users, but I find average users get endlessly confused by them. They're obvious to power users because we

> These patterns probably seem obvious to us as power users, but I find average users get endlessly confused by them. They're obvious to power users because we have seen them a million times before. When a web developer does a custom scroll bar that is when "average" users get confused, because suddenly they're presented with something they haven't seen. It's not too much to expect a user to know how scrolling works by default in their client operating system/browser. It _is_ asking too much to expect users to know how scrolling works when you customise how it works. Web developers should not be touching this stuff.