Hello, I have a fundamental question about why state space control techniques are superior to the classical methods. I l know that you can control a system with multiple inputs and outputs for several states using state space control, however, can't the same thing be done in classical control where you have multiple inner loops of one big outer loop? Is it because such an approach is inherently slow that you will have to resort to state space? Can someone please explain the benefits of state space over classical control or point me to a good reference. Thanks.