i just love the fact that my pc is cheaper to repair and upgrade....nuff said Let's see: I switched in 1986 and I'm using my computer on a regular basis, i.e. several hours each day, mainly to make money. We have a hybrid environment in our office, about 10 Win PC, 1 Linux PC, and 1 Mac. The average administration overhead for a Win PC versus a Mac has been at least 20 minutes a week in the past 20 years. Most of the overhead is directly or indirectly caused by malware protection. I never wasted any time or money on any kind of malware protection for my Mac. Assuming an additional administration overhead of only 20 minutes a week for a Win PC makes in 20 years about 340 hours. I charge 200-400 bucks for my business hour and I'm my own sysadmin. The bottom line is: I saved around 100.000 $ because I've been using a Mac instead of a Win PC in the past 20 years. If I consider the superior hardware quality and backward compatibility of my Mac, the calculation gets even worse for the Win PC. Of course, your bottom line might look different, for example when money doesn't matter or when you're selling anti-virus software.