There's a big difference between showing and telling. GP wants a demo that makes it clear that something interesting has been produced.

Modelica is is in wide use in many industries, just not yours apparently. This is kinda like linking to Java or C++ and then being surprised it doesn’t have a top level intro explaining how to use it.

That doesn't mean anything to somone who doesn't already know what Modelica is. It would be hard to be more vague. C++ technically satisfies that definition.