> It's reasonable if, like you said, the UI is very complex and if I'm going to spend hours using it. In practice, they mess up conventions on a single scrollin

> It's reasonable if, like you said, the UI is very complex and if I'm going to spend hours using it. In practice, they mess up conventions on a single scrolling page I'm spending 2 minutes on and it's usually a clue to avoid that site in the future. Scrolljacking and replacing the scrollbar are two very different things. And the problem is that there isn't a streamlined, consistent way to replace the scrollbar, so it's always a hacky mess.