Your reasoning was the huge barrier Steve Jobs faced when he came back to Apple.    Between completely ground-up overhauling the OS so it has all the benefits of gained wisdom AND the robustness of UNIX, plus the brazen effrontery to show the world what good system design and hardware design look like, he pulled off a miracle that is continuously pumping up Apple's market share. While all this was going on, enough hard work was done in the Windows world to greatly expand their range of applications, but except for a few specialized niches, almost anything is available on OS X that you owuld need in Windows; and if not, as Bonnie says, the Windows environment with Fusion or Parallel is available. Some applications run in this Windows environment faster than they do on a Pentium machine running only Windows. I swear this is true, but I have no idea why, except perhaps for the UNIX architecture.

A