I tried a North Roads style handlebar for a while, but found the one hand position to be very limiting on long rides. Don't get me wrong, I'm not looking for a "right vs wrong" answer. I'm an n+1 kind of guy, if there's even the slightest excuse to build something different, I'm all over it. 650b is my newest excuse. I'm more interested in why people choose one over the other. If anything, I'm promoting more builds. "Hey, try this one out and see which one you like!"