So to get this straight, it tooks weeks to install an os and drivers (wich would take 2 hours at most) he had a failing component (wich can happen to any manufacturer) he had the chance to swap faulty parts (thing that you cannot do on a mac).Sure, buy a PC is that works for you, but word of caution in building one:
I was headed that route until a well known and highly knowledgable tech who works for a *very* famous fashion photographer told me of his experience last year. He was tired of waiting for a new version of a Mac Pro to come out and went this route. It took him not days but almost two weeks to get bugs worked out of all the hardware and get the thing to run right. Then, 3 months later he had a couple of component failures dog him, thankfully this was his personal machine, not hardware he uses at work.
Basically he told me that since my living depends on it to not even take the chance, just sit tight and get new hardware from Apple when the specs look right. I did and I am now sailing along with my new iMac Pro.
Sometimes piece of mind is worth more than piece of hardware.
Seems to me the issue here is the user not the machine, Mac or PC they fail (just check the list of issue you can see around on both machines), I can understand preferring an os to another, but nowadays if you buy from reputable manufacturer you get pretty solid experience on the PC as well.
Windows or Mac OS, this is about the only "major" difference, the HW works the same, but cost a fraction on the PC wolrd.
If we were talking about PPC then the story would be very different.