iOS 6 was definitely way more intuitive than its successors, though. Skeumorphism and depth helped quite a bit (think the unlock slider versus "swipe the entire

iOS 6 was definitely way more intuitive than its successors, though. Skeumorphism and depth helped quite a bit (think the unlock slider versus "swipe the entire screen up, for some reason, according to some hard-to-read text") and so did its commitment to keeping the home screen prominently in view when not in an actual app, sliding folders open from the screen itself and sliding it up to show the task manager rather than covering it with those same two views the way iOS7 and up do. Earlier versions of iOS had a physicality to them that worked well to increase discoverability of their interfaces. The the "if it's not flat it makes me physically ill!" school of designers got ahold of it...