I don't find rim brakes in wet conditions that bad. Obviously braking characteristics are different and you have to modify your braking technique accordingly. It was pretty wet here this summer; a lot wetter than normal. Plus I have a lot of creek crossings on my regular ride, and my only braking issue was that the pads wear out much faster when they are wet/muddy. And that is including going down some pretty steep descents into the valley. Other than that, I haven't had any issues.