I only care how stable it is, how safe it is, how impervious to problems it is.
It doesn't bother me that only a few percent of the desktops use Linux. But, since you want to fling stats, bear in mind that almost the entire Internet infrastructure operates on BSD and Linux boxes not Windows. If you check out who's using what on the World Wide Web, more people are using Apache (a free server) on some variant of *nix, usually Linux or BSD, more than all other Web servers combined. Google servers run *only* on Linux. What you call a niche, I call the Internet backbone. That's quite a niche. One which Windows will never be able to capture as long as their security model is so flawed.
Apache Web ServerNetcraft Web Server Survey68% of Web servers on the Internet are running Apache. That means that they are *not* running Windows.
So, I'm not too concerned about the commercial software claims. I'm sticking with stability, safety, and problem-free Linux. You can stick with Windows if you wish.
By the same token, I just love the number of viruses and other crap that Microsoft seems to be incapable of preventing from invading their OS. These are problems which the Linux dev team solved way, way early in the design.
Peace.