[Pre-RFC]: Packages as Namespaces

[JeffBurdges]

I suggested a more aggressive name spacing using epochs here:

[Pre-RFC] Crates expropriation policy

We should not stress the cargo team and the deprecation scheme proposed here seems poorly defined. We should instead consider adopting a hierarchical crate naming structure in some near future rust edition/epoch, say 2020 or 2022. It might resemble: All existing top-level crate names become deprecated, except for compiler provided crates like std, core, etc. as well as a few crates like futures that integrate tightly with compiler crates. I’d personally favor also giving top-level crate name…