When was the last time you clicked on a category tab on any site? I can't recall every doing it. I think psychologically we assign very specific use cases to

When was the last time you clicked on a category tab on any site? I can't recall every doing it. I think psychologically we assign very specific use cases to our media. Go here for X. Go there for Y. Go there for Z. If you go looking for X, it's either there or it's not. You're not going to click on a tab to try and see if that subsection has what you're looking for. You're going to hop to another site that's focused just on doing X. </gross but perhaps helpful generalization>