JamesMunns[m]: > <@jamesmunns:beeper.com> long term, yes, the goal is to allow cargo to stably rebuild `core` `alloc` and `std` when necessary.
> 
> The "to be determined" part is:
> 
> * How much can you actually change, stably (e.g. what features or options are stable)
> * What kind of guarantees are made for stability for non-default features

I'd *guess* that they'd want to start small, so maybe core-only, with very few stable flags.