@rbasin:
Do you try to convince someone about his own opinion?
I ask you the same way, if Windows is so dead why are you so busy to press under the surface of the water?
MS has a site where product lifecycles are shown: Here
The UWP is a platform, and in many cases the apps are exactly the same on desktop and on phone. If you use Continuum then it also scales the same way like on desktop. So after more than a year the OS support may end, but plenty UWP apps will be sill in top shape.
@93tid: yes "on rare occasions", on almos every case, like a paid driod chatbot :)