OK, but being limited to four segments within most continents, and 16 segments total, puts limits on how much you can fly. If you don't use all your Asia segments to maximum advantage, you can make up for it by using your North American and Australian/Pacific segments. I haven't done a comparison of how to purely maximize miles because I use my RTWs to visit fun places and have enjoyable flights, while maximizing mileage within those goals, but it seems intuitive that other continents offer potential lengthly routes.