The o-chain thing is, in my opinion, the absolutely most confusing thing happening in mountain biking today. The math says it should provide zero benefit above speeds of like 6 or 8 mph (or whatever, pretty slow, depends on hub engagement but you know... pretty slow) YET, there are tens of elite level world cup racers using them, and I'm assuming thousands of people that most would consider to be regionally elite. I feel like there really needs to be a quantifiable deep dive into what it actually does. But I guess if it does or doesn't provide any benefit...