You hear this about refactoring a lot and I don't get it. I've done several multi-thousand line refactors of a 500k line rust codebase in the past few years, and it's absolutely fantastic for this task. The type system guides you along, and once the thing compiles, it almost always works exactly as you intended it to. the "quick prototyping" languages like say python are a nightmare to do large refactors in, in my experience. at least if you don't want type system timebombs lurking in infrequently executed corner cases.