No no, I know what you're implying, I was implying that the link doesn't prove what you think it does. I'm assuming you fixated on the Munich project, and that is a convoluted story and the Wikipedia entry on that is not up to date. The latest on the Munich project is that they cancelled the switch back to Windows.

Edit: And I can only assume that you were referring to the Munich story because you threw up the link with zero quotations or direct references. If you have a specific interpretation of that Wikipedia article, then you need cite things. What exactly is the "cost of migration"? Is it one million dollars or 50 million? Did it take a weekend to do, or did it bog down entire departments for months at a time? Is that 50 million dollars over budget? How are the immediate costs vs long term savings measured? Because the savings are measured in decades, not single year or several year licensing costs.

I'm not going to do your job for you. You might think that a months or even years long transition progress is unacceptable, but someone like myself who works in IT would see that is within expectations. If you have a point to make, then MAKE IT.