Is run on most internet hosting companies computers, it's run at IBM, and other large companies. 8 of ten servers runs Linux. It's just the sheep are convinced that ms Windows is the "only game in town" for business desktops because it's all they've ever seen at home, except Apple, which isn't very strong in business AT ALL.
With Microsoft's now introducing an App store likke Apple (basically) where you have to pay for each and every component, it simply doesn't make sense to use them anymore, when free alternatives are sufficient. They're in it for the money, not for the vision of the future. Don't let anyone convince you otherwise, they have NEVER had their customers needs in mind, just the almighty dollar.
Time to stop the madness.