Are there any known issues with the long-term durability of the 2016 and 2017 Warbird carbon frames? I'm not really looking for isolated frame failures due to something that would be expected to damage the frame (crashes, garage doors, etc.), but any reasons not to buy one or to wait until 2018 - dropouts failing, high stress areas that always fail, etc. I'll be using it for easy singletrack, gravel riding, road rides, but probably not any loaded bikepacking.

I am considering buying a 2017 bike (if I can still find one), or possibly waiting until the 2018s are released to see what is new, if anything.
Steve