An RFC has now entered Final Comment Period. In 14 days, discussion will end and the proposal will either be accepted, rejected or withdrawn: https://gitlab.archlinux.org/archlinux/rfcs/-/merge_requests/2 Please visit the above link for discussion. (Note much discussion in that link is relevant for the prior proposal of using x86-64-v2 as a baseline.) Summary: Provide a x86_64_v3 microarchitecture level port Build packages for both --march=x86-64 and --march=x86-64-v3. Assuming SSE4 and AVX2 (and others) while compiling will provide greater out-of-the-box performance in Arch Linux. Note, the exact implementation of this change is not discussed in the RFC. I'm of the opinion that RFCs are about ideas, so do not always need to go into full implementation details. However, to provide packages for two architectures we could (1) have packagers build both, (2) bring in packagers to keep the architectures in sync, (3) have a bot do it automatically. I'd guess a combination of 1+2 initially, and add 3 once we get the signing enclave running. Or 3 could be done with a variant of the rebuild system where jobs spawn out to available build machines. Also, we need both gcc-11 and clang-12 to be released to provide support for the x86-64-v3 variant. And support for enabling multiple architectures in pacman needs to be implemented (though we do have a 9 year old patch that did that!). So this will not happen overnight.