This was my first thought too. And there are a lot of questions that will get asked, like, will all crate library names start being prefixed as well? So you end

This was my first thought too. And there are a lot of questions that will get asked, like, will all crate library names start being prefixed as well? So you end up with use::bar; // changing to use::foo::bar; I assume the library names that can be overridden in cargo would still be accepted, and then it all gets a little messy. The transition would be very messy.