All this carbon wheel stuff is a bit relevant because carbon wheels are really a pro feature where disc brakes are a commuter feature. If it turns out most of the improvements in discs apply to carbon wheels, and yet aren't needed in pro races, then maybe the problem is more easily solved by commuters not using race wheels? Of course the industry would rather sell you carbon rims and disc brakes than aluminum rims and rim brakes. I'm not saying there's no gain on aluminum rims either. There probably is some. For me I think I'd rather just ride a little slower in the rain when approaching anything.