I have to use Windows for the myriad of engineering tools that are not available under any other OS, for example, SolidWorks, Altium Designer, various embedded toolsets, etc. And, while I've been using PC's (and Macs and Linux) since they came on the scene I hate, hate, hate the DOS or technically DOS-like underbelly of the beast.
I know it is a ridiculous idea. It would break everything, including their profitable corporate platforms.
Yes, there are ways to mitigate this but it'd be nice if all computing platforms got behind a common standard. Utopia. I know.