Better question, why would you migrate away from Windows? Linux serves little purpose for actual end-users - many developers don't care for it and developers and other IT workers are the only ones interested in Linux. Don't even start on OSX, there's quite literally no reason to use it for anyone. Productivity software works perfectly fine on Windows with the added advantage of: endless customization, end-user applied hardware and software upgrades, actual connectivity with their businesses, and familiarity. On top of that, games.
I literally have not used Linux, voluntarily, since my last Linux admin class in college years ago, nor OSX. No reason to.