LibreSSL is a special case which doesn't fit your example. They threw away code and didn't rewrite most of it - because it was supporting useless stuff. Feature

LibreSSL is a special case which doesn't fit your example. They threw away code and didn't rewrite most of it - because it was supporting useless stuff. Features like heartbeat (see Hearbleed), obsolete and insecure ciphers, tons of crap no one should ever use again but is supposed to be there for FIPS-140 or other compliance requirements which in 2017 do far, far more harm than good.