I prefer to build my solutions bottom-up, creating a component right after identifying the need for it but before whatever would be using it, because this gives me the flexibility to think about the problem in the general sense and produce an optimal solution without overspecialization.

VSCode's Rust plugin is a bit overzelous about dead code detection and runs it whenever the codebase is deemed to be correct, highlighting every item that isn't referenced from main, even if it is referenced from something else that's unreferenced.

Whenever I finally defeat the borrow checker and produce a correct solution my entire codebase lights up in yellow like a christmas tree and I'm completely addicted to this.