I’ve been wondering about this myself. One of the main reasons I’ve talked myself out of a couple of newer boat opportunities is because I spend so much time skiing a river with variable current speed. Adjusting for a variable current with zero off/stargazer is an absolute pain. It’s bad enough to calculate what speed we need up vs down river, but when you factor in slower in the wider spots, faster around the bend, faster in that narrow chute, etc, etc it is quite annoying.