I often compare open source to science. To where science took this whole notion of developing ideas in the open and improving on other peoples' ideas and making it into what science is today and the incredible advances that we have had. And I compare that to witchcraft and alchemy, where openness was something you didn't do.
Linus TorvaldsWhile we ended up having several core maintainers use BitKeeper - it was free to use for open source projects - it never got ubiquitous. So it helped kernel development, but there were still pain points.
Linus Torvalds