udin (30514) writes "David A. Wheeler, in an article on his blog argues 'I think there is one primary reason Linux-based systems completely dominate the *BSDs' market share — Linux uses the protective GPL license, and the *BSDs use the permissive ("BSD-style") licenses...Every few years, for many years, someone has said, "Let's start a company based on this BSD code!"...They pull the *BSD code in, and some of the best BSD developers, and write a proprietary derivative. But as a proprietary vendor, their fork becomes expensive to self-maintain, and eventually the company founders or loses interest in that codebase (BSD/OS is gone; Sun switched to Solaris). All that company work is then lost forever, and good developers were sucked away during that period. Repeat, repeat, repeat. That's enough by itself to explain why the BSDs don't maintain the pace of Linux kernel development. But wait — it gets worse..'"