MSFT accelerated the invetiable.
There was just no way Nokia could match Apple on the OS who spent years prior to the idea of a smartphone making it a good match for the hardware of the time. And MSFT deservedly got punished for not investing in creating a better OS and Apple deservedly rewarded for doing so.
They may never have had the chance to beat Apple but they could certainly have bet on Android instead of Windows Phone and today they probably would have been in a different place like Samsung.