I saw an analysis in Techblog. The main argument is that there are
many people inside Microsoft who believes that using proprietary
software is not recommended. And MS is actually putting millions of
its users at risk.

And interestingly they themselves are running Linux!

Here is the article: http://techblog.aasisvinayak.com/is-...ices-a-review/

What you feel about MS's change in attitude ?