[rbanffy]

> if you're designing a system that's going to require more than 6 servers you might end up paying for a license

Even if you don't have to pay for the first licenses, you'll pay for subsequent upgrades. And designing for the Microsoft makes it harder to migrate to anything else - that's probably why Microsoft invented BizSpark in the first place.

Stackoverflow shows you can get a very significant audience on a half-Microsoft stack, but they have a lot of interesting (as in "different from the ones I have") server management problems because of that. That makes their podcasts much more worth listening.