I think I saw something about a lint for bare `pub` that isn't visible to the user. I think one of the intents is to make it easier to audit for what is publicly exposed and what isn't.
Plain `pub` actually isn't quite local, and that's part of the confusion that `crate` is intended to address.
There's also the confusion of looking at a `pub` declaration and not knowing whether or not it's visible to the parent module or visible to the world- at which point maybe you don't want a purely local visibility mechanism.
