This is really a great thread. I am verrrry hard on my camera body's. After reading this the 1Dx is definitely not going to be in my bag. I get tremors just reading this thread.
Well then, I hope you never do a Google search for "<your make/model of car> problems" or you'll be walking everywhere you need to go.
The issue being discussed here doesn't seem to be about how hard/easy one is on the camera, but rather certain units with a problem, much like the clicking batch of 24-70 II lenses. In my case, my 24-70 zooms silently and my 1D X sensor is oil-free.
I know Nuro, and agree somewhat. I also watch the hard core birding sites and some there are having the same problem. AF is number one for me, along with durability at this point. When I go on a shoot I always shoot hundreds if not a thousand or more shots in a few hours. Also I live and photograph in a very unfriendly harsh environment.
Pouring over these type of threads has really paid off for me. No more product testing for me. I am at least a second generation camera buyer.
It may or may not affect me (if I bought). But, it is an issue that would stop me in my tracks. And I cannot afford two, one as a backup. At this point I am happy with my 1D mark IV, I cannot say enough good about it. An amazing camera for my birding photography hobby.