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One of the reasons that PC's have a lower resale value, is that with a variety of different manufacturers, new models evolve much quicker. Mac takes a long time between hardware upgrades. And so newer and faster chips, memory, hard drives, video cards are constantly available and plugged into PC computers.
Which brings us to the other reason so many techie types still buy PC's - they can configure PC's any way they want, with any sick number and type of ill-advised 3rd-party techno-goodness. This is why PC's are "recycled" - it's not because they're inherently inferior as a platform for Mac. It's because PC's are made for tinkerers.
I understood loving Macs - they're good machines. But this article shows a real lack of understanding of even the possible other points of view.