John Gruber recently went back to iOS 18 after a long time using iOS 26, and he had a surprising experience with the old OS. iOS 26 brought a major new Liquid Glass design that, in some cases, led to user reports of slower iPhone performance. But Daring Fireball’s John Gruber recently went back to iOS 18 after a long time on iOS 26, and had a surprisingly different experie... [1947 chars]