How long will it take, while Micro$oft starts to work on Unix based OS?
wallflower: For some reason, I'm reminded of a story that a Windows 95 product manager went to the local Electronics Boutique software store and said "we'll take everything". To test backward compatibility of DOS/Windows 3.x applications. How do you do that? Install, run, debug. Repeat.Windows' ball-and-chain is support of legacy applications and the giant-ball-of-rubberbands called the Win32 API. I'm sure some of the alpha geeks at MSFT would love to build a *nix OS - but they have the legacy of Windows.