I know it is already stable. Moving it would break things.
However, as it seemed reasonable to keep crates like rand shipped alone, it seems mpsc should be a crate of its own too?
I wonder if there’s other considerations?
I admit that it is the unstable macro select! (which seems really odd in the list of macros exported by libstd, maybe a macro with that name is something that should be exported by futures-rs!) that actually makes me think it bad there…