Doesn't matter, but they contradict themselves.
Headline: why isn't everyone using it?
Body: This article breaks down what Linux is, why it's great and how it secretly powers most of your favorite devices, from smartphones to servers.
So it looks like most everyone is using it, they just might not realize it. Which to me is a sign of a great product, when it's use is completely transparent.
You are welcome. And kudos for a well laid out, albeit very complicated question. If we were at work this is where I would have made you share your screen, lol.