Even after using Tahoe for months, I’m still regularly struck by something on my screen that I instinctively interpret as some kind of graphical glitch only to realize that it’s “working as intended” and that someone thought this design was a good idea.

For example, check out the weird smudges at the top of this Finder window. Surely some kind of error, right? But then you notice the text competing with the window title. And then you connect the text to the smudges and realize what’s going on.