I don’t think anything not mentioned in this thread already.
Nixpkgs seems to try and solve for everyone which makes getting changes in a bit harder via committee.
I’ve noticed the other alternatives (spack and guix) have a bit more of a BDFL approach which makes some large issues easier. (democracy vs dictatorship lol).
tbh, I just didn’t have the personal time to devote needed to steer it all the way through.
I am impressed with everyone who puts effort into the RFC, comments, comments, comments, issues and finally to the implementation.