I don’t think they’re saying Macs are a bad thing, but variety is. More variety means more support skills required. I think it’s a fair point.
I bought my first Mac on Monday after a lot of thinking and 12 years as a PC user.
I’m finding it pretty good. To be honest, At the price I got it, I felt the hardware was the best option for me. I like Aperture for my photos (of which there seem to be millions) but most of the other tools are available cross platform. I am also running into issues with compatibility, I can’t use my Satmap with it or my mapping software without buying a copy of windows (for another £100). I could happily use either, that might change as I get more used to the Mac.