Im sure it does. But whether or not you buy an iphone is a judgement call not financial. I have an Android phone due to it being superior in nearly every way for my
purposes. And I have an iPhone 6s plus given to me by my work(sys admin). I hardly ever use the iPhone other than to read work emails and receive work related calls and texts. I just don't enjoy using it.
I would never buy an apple product for many reasons, but primarily because I can do anything I can do with an iDevice with more freedom and less cost. Even if I was a multi billionaire I wouldn't use apple products.
This is unrelated to iPhones, but the Phoronix website did a comparison of Windows 10, MacOS El Captain, and Ubuntu 16.04 and did benchmarks for various things on a Macbook Pro. And on a macbook pro, Ubuntu and Windows did better on nearly ALL the benchmarks.
Im just not an apple fan for so so many reasons.