Right but portrait mode didn't exist before iPhone 7+ iOS 10.1. They didn't take away anything and then give it back, they simply added that new feature after t

Right but portrait mode didn't exist before iPhone 7+ iOS 10.1. They didn't take away anything and then give it back, they simply added that new feature after the iphone7+ was released. It wasn't just a standard optical focus feature that the iPhones had previously. It is using software to identify the subject and blur the background to give the effect of a dslr camera when shooting a portrait photo with a low aperature setting.