LOL, I bet they have wet dreams about finding cracked carbon parts. I recall Grant's post about the dumpster filled with the carbon forks his customers didn't want to ride. I'm still looking for that dumpster...
I suspect CF has a life cycle equal to or exceeding steel. But, not if it's damaged...and that's the rub. Who knows? I might agree with those who advise a two year limit to those owners who routinely trash and crash their bikes...CF is a timebomb for them. Me, I bet I'd get two lifetimes out of a well made CF fork.