You can achieve some level of OO design by using traits (the generic kind, not the dyn kind), but I think the functional style and inline testing gives you a to

You can achieve some level of OO design by using traits (the generic kind, not the dyn kind), but I think the functional style and inline testing gives you a ton of nice properties for free! Rust also pushes you to refactor in a way that really pulls out the core of your problem; the refactoring is just you understanding the problem at a deeper level (in my experience)