Comment by doright

I prefer 3-button navigation, but it seems most of the web has decided that gesture-based navigation has won, and it's an awful experience sometimes. They assume you will always swipe down to close popup modals like full-size images, so pressing back will instead navigate out of the page. And half the time, navigating forward puts you right back on top of the modal again!

It breaks the intuition that one tap == one piece of state on the navigation stack.