Author here. Thanks for sharing your experience. But how do you know whether Python or C served his needs better? For all I know it could be Python -- you can build a web server using Django, write scripts, do machine learning, do computer vision using OpenCV... These might very well be more useful to that person than what C lets you do. Nobody should learn C because you think it's important; they should learn it if, and only if, it's the best tool for what they want to do.