More on OOP: Polymorphism this time

This post is about how Rust features line up with how OOP uses polymorphism: https://www.thecodedmessage.com/posts/oop-2-polymorphism/. I feel like there's so much to say about this topic, but this already seemed like enough, so I'm posting it :-)

Also thanks to everyone here who read my response to Dr. Stroustrup's article -- I didn't expect it to be so popular.