Open source development process:
Quoting Eric Raymond: "The pattern is simple and compelling. Where we have open-source software, we have peer review and high reliability. Where we don't, reliability suffers terribly."
"Microsoft Windows machines are subject to frequent lockups, generally require rebooting more than once a week, and need periodic re-installation from scratch to eliminate problems such as registry creep and DLL conflicts." Linux systems, on the other hand, "are so stable that many only go offline when brought down for hardware fixes and upgrades."
" Windows and Microsoft Update only do a handful of Microsoft applications. With Linux, the OS updater application handles software from other companies too. Huge plus for Linux. Huge."
Reliability: "The biggest and most unwelcome surprise in the survey was that Windows Server 2003 downtime increased by 25% to nearly 9 hours of per server, per year downtime compared to the results it achieved in Yankee Group's 2006 Global Server Reliability Survey." - Yankee group 2007-8 survey results.
Linux is superior to Windows in the areas of licensing, flexibility, command-line control, peer support and community, centralized application installation, security, cost of ownership, and interoperability - Jack Wallen 2008 TechRepublic