K
Same amount of nosedives on XR vs OW+. I've ridden so long I can usually run them out or regain control. They usually happen when going uphill and hit some hole in the road, just not enough power to get over 'em. OW+ I rode almost always in Mission, for XR, it's almost all Delerium.
Also, by far, most falls are from washouts - slipping on gravel, stuff like that, from losing traction...