Reminded me of these relevant articles:
Yep, you can always count on Linux Zealots to bring that up anytime you point out issues with their OS. This, despite the fact that their precious supercomputers run a heavily modified, often internally altered and thus proprietary, kernel, that for all intents and purposes is
not Linux anymore.
The reason they don't typically run windows is simple- Windows isn't a SuperComputer OS. Linux isn't either, that's why they have to make modifications to it. Though I sorta wonder why they use Linux rather than a BSD, though.