Perhaps a small part of it is loss aversion, but I doubt it's no more significant now than it was historically. Macs have always had higher-than-average resale value. That seems (according to this thread) to have possibly changed in recent times. If it has changed, I don't believe it can simply be attributed to one factor, and one factor only. IMO, it's not simply due to an increased market share for Macs. It most likely also has to do with the lack of "upgrade-ability" (and perhaps other factors, but I'll briefly touch on only this one here.) There's probably a significant portion of people that would have normally been in the market for a used Mac, and were most likely in that market to buy it and then upgrade the RAM and storage. Knowing that you can no longer do that has probably played a part in driving the re-sale value down accordingly.