Is this something the portion of the community outside of the compiler maintainers can help with? I’m happy that the RFC process is being tried, as it’s helpful and interesting to see some of the design and thought process that goes into new compiler features.
It’s also unclear where/when community members who are not going to be directly involved in the implementation should get involved in the RFC process. Do you have a sense yet of what you’d like the balance to be, so that the feedback is helpful but doesn’t get in the way of implementors’ discussions?