> Why are people so enthusiastic to give hours away for free to commercial projects? This is a naïve view of the situation. You claim these people are working

> Why are people so enthusiastic to give hours away for free to commercial projects? This is a naïve view of the situation. You claim these people are working "for free." In reality, many of these people derive income directly from Apple's software ecosystem. Their efforts to improve this ecosystem will in turn improve their ability to make and sell software, so it's not necessarily purely altruistic. Second, Swift/XCode is a means to an end: developing software to run on iOS, OS X, etc. If someone begins with the destination in mind (e.g. is letting the product determine the tools, rather than the tools determine the product), then the choice of tools is secondary. You imply that bettering your tools is fruitless if you're not the one making and selling the tools. This seems very shortsighted. Also, while open source is great, I don't understand this hardline value judgement that open source is good, and commercial is bad. That's your prerogative, but it's a personal preference.