content: There is absolutely no reason to re-invent the wheel and waste years trying to redo what's done elsewhere.   There is a hugely important reason:  Most all code we use is built on 20+ years of bug and security fixes.  yup, that's it. A from-the-ground efficient, open source OS would avoid all those decades of backwards compatibility headaches. Done right it would spank Windows like a drunken stepfather.