I'm wondering why the `mut` keyword is named the way it is when you can still have "interior" mutability regardless of whether you have a `mut` reference or not.
The mut keyword on variable bindings doesn't influence uniqueness at all, though. You're probably thinking about the `&mut` references vs the `&` references.
In the end, we decided that these are two equivalent perspectives, and decided to stick with the more traditional mutable/immutable distinction.