OnePlus One Windows Phone Edition

Wouldn't it be great to see Windows Phone as an option on the new OnePlus One phone?

Now that Windows is free of charge for OEM on small devices, why not giving consumers the option to go for Windows Phone instead of Android?

Is it really that complicated for phone manufacturers to support a second OS?

Or is the demand too low for Windows Phone that the model doesn't scale?

What do you guys think?