For a while now cppreference.com has been in "temporary read-only mode" in which it isn't updated. Eventually I expect a "temporary" replacement will dominate and eventually it won't be "temporary" after all. Remember when some of Britain's North American colonies announced they were declaring independence? Yeah me either, but at the time I expect some people figured hey, we send a bunch of troops, burn down some stuff, by Xmas we'll have our colonies back.