Funny thing is that so many institutions that use Linux / opensource actually get MS products at massive discounts - virtually free! I'm thinking here mainly of charities and educational establishments.
While large corporates and Government (local, civil service) can negotiate hefty discounts with MS on volume licensing, it leaves the small - medium business with the biggest expense sticking with MS, therefore the greatest driver for a cheap alternative, but they are worst placed from a technical perspective to convert and support.
Funny that.
SD