Rewriting using Raskin's theorem - " Since re-joining the iOS world last year, I've been amazed at how many (often nifty!) features are utterly unfamiliar. I was still discovering new features either on accident or via articles, multiple months into ownership of my iPhone. Once I learned about the features many of them were great, but it's very surprising given Apple's focus on familiarity."

Ref: Intuitive = Familiar ... By Jeff Raskin