Incidentally so will analog, mechanical etc. anything. I got my Nikon F2AS off eBay for sub-$200. For a camera that was once the top of the SLR game.
Are we to call this "analog rot" now in the words of the original poster?
News flash: As technology progresses, things depreciate. The only way for things not to depreciate is if there is no progress. And even then it takes hype to keep prices up.
The "shocking for some" news is not, "THAT" digital gear depreciates (as does any gear with falling market interest), but "HOW FAST" digital gear depreciates in comparison to "the old times".
The M8 camera is just 4 years old, which is an age of not having reached half a product cycle of the professional 35mm cameras from a few decades back and has also bottomed at all time low second hand prices, which make them very, very affordable (compared to their new sticker price).
The term "digital rot" (is this actually created by Ken Rockwell?) indeed fits very perfectly well - not only in terms of faster depreciation, but also in terms of potential unusability in the very soon future.
I have read with great interest Ken Rockwell's new review on the Nikon F5 and was amazed (or you can call it "woken up") by the fact, that you have to jump quite a few hoops, to make the digital connection between then modern camera and computer working with specific cable connectors, specific software suites, that ran only on the "then modern" operating systems.
These things will happen by design.
It is already difficult, to find straight simple SD cards, that can be read by older cameras. It indeed is luck, that the EPSON R-D1 uses a now still popular battery format, which is available for many other devices in South East Asia.
Having learned from the R-D1, I maintain a good stock of memory cards and batteries for the M8.2, as I really would like, to shoot this thing as long, as I like and not, as long, as the electronics do.