I feel it depends how hard you ride, and how much crap you thnk you will hit. Polaris cant keep the carbon fibre from pulling out of the aluminum. weather its the a-arms or the overstructure. 12's are stronger, weigh a bit more and they're by no means bulletproof either but glue will not hold carbon into aluminum on a hard hit.
oh and polaris warranting any is like pulling teeth
a arms are steel tubes into aluminum ends. I've never seen a tube pull out of the upper but I have seen them break