If we are just lucky, then there are millions of lucky PC users. It seems the chances of being lucky enough to have a stable windows machine are so high that it's just not quite luck anymore. Maybe it's just your company that's unlucky.Windows is just not stable, folks. I've been in the computer administration biz for years and so I'm relaying this from experience. You might get lucky and have the odd machine that works, but most won't work for long because of how system errors propagate. And then the hardware is cheap, so again, when cutting corners sometimes too much gets snipped off.
As far as stability goes, my personal view is that Windows allows for a stable and even transparent experience on the PC. Live has never crashed on me, nor has Project5, Reason or Sonar (with the exception of misbehaving plugins). There are many choices for PCs and I agree with quandry about some PCs having cheap components and some having high quality ones, but even if they have cheap components it's not the OS that's causing problems. I've had friends call me up saying that their MAC crashed hard on them, forcing them to reinstall and the situation is no different on a PC.
About speed, raapie mentioned that he heard the OSX GUI is more sluggish than Windows and I've heard the same and in fact I've used them in stores coming to the same conclusion. We all know Live performs better on PC. Reason implements Velocity instructions for the MAC version but doesn't implement SSE1 or SSE2 for the PC version and their stance was that the PC version performs great already. What about those digital video editing results?
As far as OS features, well what can OSX do that Windows can't? I can make windows look how I want, as well as any other program for the PC. So looks just shouldn't be an issue. Just as OSX has stuff like CoreAudio and Audio Units; Windows has WDM and DirectX. Is iTunes really venerable enough to merit the use of OSX over Windows (well I guess this one doesn't matter much since it will be available for Windows)?
These days the only reason I could see in getting a MAC over a PC is if the user already knows how to use a MAC and doesn't want to or can't spend time learning Windows.
This isn't a flame and I'm not trying to form a definitive argument of any kind (too time consuming). This is simply how I see it that's all. For me and many others WinXP is stable, fast and good at what it's meant to be; an OS. The software that one runs on it, has the potential to be 100% stable and Live is the perfect example from my experience. Just as a bad VST plug can take Live down, a bad driver could take Windows down. Is it any different on OSX? I wouldn't think so.