The best part is that every website now feels it necessary to completely override the unusable skinny built-in browser scroll bar, then add a useless, non-interactive horizontal progress bar at the top of the screen instead.
As I'd commented on the Fediverse thread discussing this post, the distraction of having a horizontal animation responding to a vertical movement is absolutely maddening.
On desktops, I'll remove that horizontal bar via uBlock Origin's element remover or a Stylus CSS rule.