I am really excited what this demonstrates for #ReproducibleBuilds in #Guix both for a third reference point...
But also that you can enable the build farm without trusting it, relying on the signatures from the more established servers, and download the bit-for-bit identical binaries from the "untrusted" one.
Which is not to say there is any reason in particular not to trust the new build farm... just that you do not have to trust it for it to be useful!