Bus Duct and Arc Flash Hazard?

I was asked to evaluate some “newer” bus duct technology that are finger safe, use a turn and lock connection or similar methods without turning off the power. It seems to do a great job at significantly reducing if not outright eliminating the shock hazard. It also looks like the risk of causing a fault when installing or removing a module is reduced (eliminated?) as it seems it would be very difficult to short line to line or line to ground. Therefore the arc flash risk greatly reduced (eliminated?). Assuming there is > 1.2 cal/cm2 energy available, is there still a arc flash hazard here? Comments on Labeling? PPE?
For example only as there are other manufactures with similar technology. https://www.youtube.com/watch?v=B03Bnhh6w8E