I stumbled upon this quote on Rob Conery's blog, which referenced an old post by Robert Scoble in which the following was stated, concerning why startups don't use Windows:
They don’t want to take s*** from their friends (or, even, their Venture Capitalist). Most of this is just pure cost-control. I can hear the conversation now: “OK, you wanna go with Windows as your platform, but is the extra feature worth the licensing fees for Windows?”
Is this attitude still prevalent? If you're just running (or planning) a small ISV... and you might need a dozen servers, then the cost for Windows vs Linux is fairly negligible, at least comparing EC2 / Peer1.
If it is, I find it somewhat surprising. Even as a "technologist", I don't really care one way or the other about the platform. I do care about the profitability model, but compared to the cost for rent or the salary of even an entry level engineer, I just don't see the hosting cost as being terribly relevant.