Wrestlers in the UFC that are "folkstyle based" only appear that way because they are Americans. In reality, the wrestlers that have done the most in MMA have strong Greco backgrounds; Couture, Henderson, Jon Jones,
Lindland... That is because of the hand fighting, and fighting from the clinch--deemed "Dirty Boxing." I do agree that folkstyle may emphasize controlling your opponent on the mat better than freestyle for MMA, but do you guys really believe that Pico, Cejudo, or any other American wrestler doesn't have enough folkstyle experience to control on the mat even if they abandoned that style years ago? They still have 10 years of folkstyle experience under their belt. If they never wrestle folkstyle ever again (they won't) it won't hurt their MMA at all. Besides, Kalika was a Greco guy.