well, they *always* claimed that had an answer: their argument all along has been that the TCO of windows is lower than linux. and then slap on top of that some security, vague promises of "integration" and user friendliness, yadda yadda yadda.
although i suppose the real "warning" came when they recently lowered prices. theregister.co.uk covers quite a bit of what msft has been doing in negotiations to win against linux, one battle at a time.
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