Yeah, I definitely feel like I start going crazy when I have more than 8 tabs open. I close tabs pretty aggressively. They're always in the history anyway, and I've only had to dig up an obscure old page I visited, maybe like once a month if even. So...
I do wonder if someone there saw nobody was clicking on the button, and thought the solution was to make the button catch attention, instead of coming to the proper conclusion that many people just didn't need or like the button's functionality to be...