The Jem report: “One thing stands out as oddly hypocritical is the fact that Ubuntu's development tools — collectively called Launchpad — are proprietary. Even worse are the company's explanations for why Launchpad is proprietary.”
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Sometimes you're stuck with proprietary software because there are no alternatives. Such is the case with some hardware drivers and a very small number of desktop programs. But whole operating systems are developed in text mode editors like Vim and managed through CVS, and many similar tools exist for the functions that Launchpad provides.