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Full agree with 1, I do use 2 depending (if I'm making a tree of modules for organization, and a module only contains imports of other modules, I'll use the curly brace form to save the need of making a file), and I'm not sure why 4 makes it harder? Wouldn't it be more confusing if order mattered? maybe I need to see a full example :)

Thank you!

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In `use foo::bar; use bar::foo;`, am I importing an external crate called foo that has a submodule bar::foo, or vice versa?

This bit me when trying to write a static analysis tool for Rust that finds missing imports: you essentially need to loop over imports repeatedly until you reach a fixpoint. Maybe it bites users rarely in practice.

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