It's easy to criticize such decisions in hindsight, but after WinMo 6.5 as a response to the iPhone I began to question Microsoft's dedication to the mobile space. Were I in charge of purchasing 36K mobile devices, that would certainly have factored into my decision. OTOH, I'm guessing the purchase decision was made somewhere toward the end of the WinMo 7.x timeframe, when it could have looked like maybe Microsoft was going to stick with it.
On the other other hand, if you've been making purchase recommendations for more than a few years, feel free to cast a stone or two if you've never made a recommendation that, in hindsight, was kind of a poor choice. Me, I'm leaving those rocks on the ground.