Fascinatingly, I am not aware of any real issues with how Rust did nested modules. It even treated crates as top-level modules for most language-level purposes.

Fascinatingly, I am not aware of any real issues with how Rust did nested modules. It even treated crates as top-level modules for most language-level purposes. I am sure there are nuanced reasons that C++ can't do quite the same, but the developer experience consequences can't be worth it.