Boxing is not limited -it is a refined sport and very intricate. Whenever people mention kickboxing I always see that as a bit of a joke because it takes away from the technique of pure boxing with block and punching and counterpunching. Yet kickboxers would have a big advantage over a pure boxer but so what. Pure boxing to me is art, kickboxing is not as much art. Can you imagine great fighters like Hearns or Jones (who have skinny legs) doing well with kickboxers when they kick the legs? They would not do so well, although Hearns did fight an exhibition once against a guy named Superfoot Wallace. Guys like this Sherk fellow can use their legs and body and everything.. All different kinds of tactics. Doesn't mean it is better it is just a legalized streetfight. Boxing is a sport of art. It is the sweet science and when you have two great fighters in the ring there is nothing better. It is as much art as a great painting or making a sculpture. Octagon or ultimate fighting is on a good upswing lately because of cable tv, but it will never have the classic artistic aura of boxing.. But I do respect it and the work these guys go through.