State-space is less relevant to regulatory and servo control loops (which is the majority of loops out there), and more of interest in advanced control systems.

State-space is less relevant to regulatory and servo control loops (which is the majority of loops out there), and more of interest in advanced control systems. Of course, in Masters programs, you are already expected to know basic PID control. Graduate courses that cover PID control tend to focus on intricacies like loop pairing, RGA, etc. PID control is an eminently practical field of study, and has many interesting facets like bump transfers, split range control, etc. There's a lot to learn about PID control that is non-theoretical.