From conversations with a couple dealership mechanics, the problems with AFM system is most prevalent and almost guaranteed in two cases. Case one, people ignore the factory specification for oil and try to run 15-40 diesel or other higher than spec weights. Case two, people ignore the factory oil change interval. If you're avoiding those two cases then odds are greatly in your favor of not having issues.
I ignore my factory oil change interval and change my oil at 5000 miles.
