Somehow I may have over edited and removed something your wrote. There is nothing wrong with iterating as long as the baseline was successful. Ford doesn't redesign the Mustang every year. Chevy doesn't redesign the Corvette every year either.
Most of my friends/immediate fam have iPhones or will purchase one in the next 3 months. In a mall a week or so ago, I saw 10 iPhones to one Sammy being used in public. All strangers. So my anecdote cancels your out. In addition I saw someone buy a 5C.