I agree with the sentiment - and I am a dedicated Ubuntu user for everything that's work/business related, as for those use-cases I don't trust Windows at all. Using Ubuntu for important stuff made everything safer on my end, and I only use Windows for gaming. Windows is a gaming OS, and so it shall remain.
However, I have long gotten off the soap-box that Linux can (and should) replace Windows, esp for gaming. It simply cannot, and doesn't want to, either.
However, in DCS' case, I can see a dedicated Linux server for MP only, that's command-line driven and thus has much less overhead than a similar server on Windows.