I would expect the carbon fork to last you the lifetime of your bike. I've had full carbon bikes that were 20+ years old and had no issues...
Any bike can be destroyed due to misuse, no matter the material.
My carbon fork (from 2009 BMC bike) has suffered minor damage from a pebble getting lodged in between the tire and fork. It is missing the paint on that spot, and perhaps a little bit of the resin has been chipped off. This caused me some concern at first. But I've since ridden it for another 5 or 10 000 km with no issues.
Honestly I cannot believe how many threads on this forum are made up of discussions on carbon fiber and whether or not it is safe/ prone to failure / better or worse than steel or alloy.
