Why the iPhone sometimes feels stuck in the past

Recently, I decided buy an iPhone 6S and turn on iMessage.1 iPhones are great! But in the process of setting it up, I ran into some hassles that reminded me that for all the advancements that Apple has made with iOS over the years, it still can feel like it's stuck in an old era of phones that were controlled by corporate politics. The iPhone is a computer, but sometimes it acts too much like a RAZR.Anything even remotely related to managing files is a complete disaster on iOS, and it's one of the main things Apple will need to address going forward, now that iOS is their future.