[4thaccount]

I haven't used Simulink since my control systems classes in college.

With that being said, certain tasks (control systems is a big one) naturally map really well to Simulink because the graphical block-diagrams in Simulink are identical to how your teacher draws out the system on the blackboard.

To use an example, power systems texts might use Matlab to show the algorithms for transmission level powerflows (Newton-Raphson, Gauss-Seidel, Fast-Decoupled, DC), but they use Simulink to show how the control systems on a generator are modeled and you can easily inject an oscillation and plot out how it would impact the generator. You could of course model the control systems of the generator with regular code, but I think it would be far harder to reason about. I know Scilab has something called "xcos" or something like that which is the beginnings of a free Simulink competitor, but I haven't seen anything in Julia or Python that can do what Simulink can do. If someone knows how to best do controls work in Python or Julia, please let me know how.