Why apple still remains amongst the top operating systems
Why a few people still choose iOS over android and ubuntu.
The reason is the ease of use. I recently gifted my paernts an ipad and a nexus 7. They told me that they aren't comfortable with android OS. Younger generation like complicated stuff because it feels more techie. Although it isn't the same for older people. They want to use technology at the same time want it to be easy to use. That's exactly what apple iOS is all about.