> I still don't understand why. Look at Apple and compare the iPhone and Mac versions. They share the same architecture and a lot of code and that is not just

> I still don't understand why. Look at Apple and compare the iPhone and Mac versions. They share the same architecture and a lot of code and that is not just on the surface but for real. This allows Apple to have one very, very good codebase for their OS. Microsoft did not have that solid foundation and additional challenges particularly in the area of security. There was no way for them to catch up if they maintained multiple platforms. To see where trying to have multiple platforms lead just study Nokia.