That question is addressed in the article as well: "The biggest headache when coming across these menus on the web is the complete disregard for accessibility."

That question is addressed in the article as well: "The biggest headache when coming across these menus on the web is the complete disregard for accessibility." And by "accessibility" I'm quite certain the author means "usability for people with impairments that don't allow them to use a mouse and keyboard or touch screen".