Replying to
@mirabilos@toot.mirbsd.org @kaidenshi@exquisite.social @thomholwerda@exquisite.social
Another issue I hadn't thought much about that affects (Open|Net|FreeSLOP)BSD is LLVM. All three include it; it's the base system compiler for OpenBSD and FreeSLOPBSD. LLVM is actively accepting slop; a very hasty search shows at least 25-30 commits.
My understanding is that the LLVM in the OpenBSD tree is effectively a maintained fork specific to OpenBSD, but I don't know much extra labour this will end up adding to exclude the slop there.