I don't use Windows.
I use UNIX.
(BSD-flavoured with a commercial GUI, since you ask.) I hate all OSes. They're all shit. Some are marginally more tolerable than others, but it's a close-run thing.
The article claims that Linux is "worth" a billion to somebody. It isn't. It's popular primarily because it's free and has had billions of dollars jizzed all over it in the form of *advertising*. It sure as hell hasn't added anything of any great note to the IT industry aside from this, unless you can explain exactly how a rip-off of a rip-off of an OS that's almost forty years old is of such a massive benefit in this day and age.
Has it expanded our understanding of computers? Nope. Has it created a new way to develop software? Has it fuck—if anything, it's made programming harder! Has it, in short, done anything MINIX, BSD and System V weren't already doing? The answer is a resounding "no". And it's taken only 19 years to achieve this through the unique development process based on the "stupidity of crowds". (Seriously: how long does it *take* to come up with a single, unified install and uninstall system, or a single, consistent GUI, with proper guidelines? Microsoft cracked this in 1995 and even Apple have managed to pull it off. And on a BSD-flavoured UNIX at that.)
That universities and research labs are more than happy to go with Linux for their supercomputers is hardly a great shock: it's a free OS based on UNIX, which was invented *by* researchers, for researchers and programmers! And QNX was running just dandy on embedded systems years before Linux came caught onto the idea.
You don't hear BSD users going into a media-wank of self-congratulatory bullshit every blasted day on the internet, even though the free 386BSD project was already in development long before Linus released his first kernel. But anyone would think the GNU and FSF people *invented* the notion of giving stuff away for free, and that the long-standing concept of Public Domain is but a figment of my imagination.
There's nothing remotely special about Linux other than the juvenile politics it comes bundled with. It's just a damned UNIX clone that took nigh-on twenty years to reach its present level of mediocrity and "good-enough-ness" (you know: that thing everyone used to accuse *Microsoft* of achieving.) It's not magic. It's just tragic. A technological dead-end.
And yes, I doth protest too much. I'm angry. Over the last 30 years, I've seen far better operating systems flare briefly in the light of day, only to be snuffed out by far less deserving rivals thanks to humanity's love of wilful ignorance and short-termism.
Bah! I'm off to go strangle a kitten.