I'm not sure your responding to the problem the OP has. He isn't saying Python isn't good for all the things you've listen. He is saying that for starting off i

I'm not sure your responding to the problem the OP has. He isn't saying Python isn't good for all the things you've listen. He is saying that for starting off in an introductory classroom environment, python is too complicated for simple interactive applications. MVC web app certainly goes above and beyond TkInter in complexity. If you need to develop the web app, then you'll probably end up teaching Javascript anyways to accomplish what he is addressing. Having tutored friends in introductory courses before, functional programming would certainly also go over their heads. So while I agree with you on your points. I agree with the OP that perhaps Python isn't the best language you want to use as an introductory course (if interactive GUI are on the to do list at least), but maybe bring it in during the second or third course.