I wrote "a trusted binary of a previous release" not just "a trusted binary". There is obviously a difference between having a small set of trusted binaries to

I wrote "a trusted binary of a previous release" not just "a trusted binary". There is obviously a difference between having a small set of trusted binaries to bootstrap and having a bootstrap binary for every language or build system. There are several compiler implementations that enable bootstrapping from alternative implementations, which shifts the problem to a simpler language, which may already have a bootstrap path. See also http://bootstrappable.org/best-practises.html http://bootstrappable.org/best-practises.html