Did my 5DII stop working? Just wondering.
Actually, sometimes I miss the good/bad old days of film. I used cameras for ten years of more, typically. I still have cameras from the 1970s that are perfectly usable... the film has been updated in the meantime, and I've upgraded lenses in some cases. So, a familiar "old friend" of a camera is still as capable as ever. Heck, I bet some folks less serious about their shooting only owned one film SLR in their lifetime. AFAIK, my Dad used the same pair of Leicas from the late 1950s until he stopped shooting at all (and gave the cameras and lenses to me).
Yes, 5DII isn't fitted with "cutting edge" auto focus by any means. But it still does the job pretty darned well. Much of the stuff that comes out on the newer models now is just bells and whistles, niceties instead of necessities.
I'd love it if 5DIII had a little better AF, perhaps an articulated LCD screen, and a few other things. It would be cool if Canon incorporated some of the software tweaks that Magic Lantern has come up with (personally, expanded bracketing and focus stacking bracketing are things that interest me the most). But I really don't see huge need to change sensor/processor or frame rates. Metering is pretty good, too... though I still miss my EOS-3's spot metering linked to the active AF point.
For a while digital imaging technology was leaping ahead very fast. Now the "basic stuff" isn't changing all that much. It's the add-ons such as wireless flash, video, etc. that are being "upgraded" these days... Many of those things I really don't need, personally, or would rather add with a separate module.
5DIII will really have to blow me away with some surprising features, to get me to upgrade very quickly, so long as my Mark II keeps working properly.