That sounds like how I use tabs but doesn't explain how people end up with enough tabs open to make them impossible to navigate in a horizontal layout and witho

That sounds like how I use tabs but doesn't explain how people end up with enough tabs open to make them impossible to navigate in a horizontal layout and without grouping them. When I'm done with a tab, I close it. If I'm going back to it later, I leave it and... go back to it later. If I don't, I close it... or I bookmark it. I don't see how you go from using tabs as a short-term "read later" feature to having several dozens of them open at any given time. And while deleting bookmarks takes a second to do, so does going through your tabs to get rid of the ones that haven't been useful in 2 months. Personally, if I run out of horizontal space I consider it a good reminder to clean up, but then I see people with so many tabs that all they see is a ton of icons, and I wonder if they even know that bookmarks exist. That image came to mind as I read some of the other comments under this post, and I feel like we're just reinventing bookmarks for people who don't realize that bookmarks exist (bookmarks have been deemphasized for a while through trends like hiding the bookmarks toolbar by default).