Like you said, it's about the right lane exiting (or ending) versus the left lane ending. None of the lanes has to exit. Outside of Canada it's typically done like this. That way you can drive in the right lane without worrying about when your lane is going to end or turn into an exit.Having the right lane exit is better from a capacity standpoint because it results in less bottlenecking - the lane disappears where cars disappear along with it. I don't know if the MTO has considered the impact this has on people who now understandably avoid the right lane.