There's now an entire generation of IS/IT managers, directors, and CIOs who not only prefer Microsoft technology but have an active dislike of anything related to Unix(tm) - including but not limited to Linux(tm). And along with dislike comes distrust and contempt. They firmly believe that Microsoft provides superior technology, tools, and usability, and that to choose other technology is not only to make a mistake but to expose themselves to professional risk.
You can disagree with them if you prefer (I tend to, myself). But people holding this set of technical preferences now makes up a substantial fraction - possibly a substantial majority - of technical decisionmakers in the US at least.
sPh