People making distos, as well as anyone who has been bitten by unreproducible binaries generated by hand-crafted/manually driven build processes.

When I install software from a distro, it's been vetted and I can safely assume the software has a sane reproducible build process, or at a minimum, has had a sane reproducible build process added by the package maintainer.

If a new standard wants to solve that process, I'm all for it, but I demand reproducibility (or somebody to hold financially reaponsible, in the case of closed source)in my software builds.