[Czarnian]

Don't underestimate the power of institutional inertia. The large companies that make up Microsoft's market segment will resist change for the sake of resisting change.

You have to keep in mind that the decision makers don't care about the tools. What they care about is making sure the worker bees stay productive. To do that, they are averse to disrupting the environment by doing things like switching the productivity suite. To them, it's worth the license fees to not experience the inevitable drop in productivity (and rise in help desk costs) that a switch would drive.

When it comes to their core business of operating systems and productivity software, Microsoft won. They have no real competition.