I personally like the Windows OS because it is lightest among any os in the present market.
It is lagging in the variety of app available on windows platform as compared to apple store or android app store. This is the main reason why windows platform is lagging.
This cause fewer users to buy windows phone which leads to reason that app developer does not develop an app for windows phone.
The latest windows phone Lumia 950 xl I liked it very much because of its DISPLAY DOCK it is kind of best productivity that a smartphone can do. Just connect to any monitor and get started, it becomes a computer.
Its camera is very nice too. It has iris scanner for unlocking the device. In my suggestion app developer should develop more app for windows platform.
Thanks.