Thank you for a well articulated article. Up until now, I had trouble with concretely understanding the negative points of having an open source monopoly in so

Thank you for a well articulated article. Up until now, I had trouble with concretely understanding the negative points of having an open source monopoly in something. I thought, following DRY principle is good, why would anyone want to do same thing more than once? Now there's something to think about.