Because people are concerned that the embrace, extend, extinguish of Microsoft will rear its ugly head and we’ll all have been bamboozled again to use closed source software.
I've not been unable to understand why people trust a corporation with 20 years of demonstrable embrace, extend, extinguish and other tactics, and with not even a word of repentance or even contrition, to not do this again. I think we should be assuming it's in the corporate culture to do this again unless they at the very least publicly say they intend to do otherwise. (Of course, talk is cheap, but if you want to rebuild trust, it's the first step.)
Although I pretty much disagree with their entire design value system even on the technical and UI levels (especially the latter), and can't see why anyone puts up with Windows. But clearly many people do, so obviously I'm missing something.
People have been bamboozled, but maybe not the way you're implying.
Microsoft is only doing open source since it proved to be an extremely useful way of doing things, not because they turned into an altruistic company that started caring more about making the world a better place rather than making money.
Although I pretty much disagree with their entire design value system even on the technical and UI levels (especially the latter), and can't see why anyone puts up with Windows. But clearly many people do, so obviously I'm missing something.