true, there is one big problem, though - those Brazil teams did so before Ajax's total football took over the world ... after that, exotic systems like a true 4-2-4 became a form of suicide.
Anyways, I still maintain that this 4-2-4 thing from Conte is just a glorified 4-4-2 and nothing more - any team with more attacking backs, allowing the wingers a bit further up the field, playing in a 4-4-2 can easily claim they have 4-2-4, merely a matter of semantics.