See my other comment, but matz specifically eschewed enforcement provisions. See https://bugs.ruby-lang.org/issues/12004 https://bugs.ruby-lang.org/issues/1200

See my other comment, but matz specifically eschewed enforcement provisions. See https://bugs.ruby-lang.org/issues/12004 https://bugs.ruby-lang.org/issues/12004 and e.g. search on his name, also skim to get a general idea about how it all happened.