Windows on phones stymied by moving goalposts... just like Symbian
(All About Windows Phone)

The problem with the tech world is, from an operating system provider`s point of view, that the goalposts keep moving. These perambulating pieces of wood killed Symbian, killed Blackberry, have almost killed Windows Phone and Windows 10 Mobile, and, one day, may even kill iOS as we know it today. With hindsight, it`s all too clear, but at the time OS coders were making sensible choices.