In iOS 10, you just need to tap on "tabs" icon a little bit longer and it will pop up something like this:Yeah, lol, now I see where you're coming from. That also means I naturally delete ~500 tabs in 1.25 months tho. Looks like I'm going back to that anyway 'cause I'm at the limit. I feel like like need a ceremonial 'hold + sign -> delete all tabs' adult beverage.

Then you can close all tabs in just one tap.
Maybe next iPhone should integrate 128GB of RAM to keep all 500 tabs open without refreshing.
