I wrote up a mostly-complete pitch for this here, and (speaking for myself only) I don't really expect that this would be a particularly controversial change. There are some lingering design questions to settle I think, and a prototype implementation would need to be prepared to bring this to being a full proposal.
I wasn't able to land an implementation back when I initially worked on it, but I fully support someone else picking up this effort. Otherwise, this is on my list of things to pursue whenever I have some free time to dedicate to landing a proposal. 