[dcsobral]

Citation needed.

Please provide studies to the effect that the practices you consider "proven" are, indeed, effective and references to the fact that they were widely adopted before the agile movement.

Because, so far, you've drawn a line based on personal opinions -- actually, just your own personal opinion -- about what's effective and what's not, what was common practice and what was not, said everything effective was common and everything not common is unproven, and then, based on this edifice or your own single opinion, declared that the agile movement didn't improve anything.

I'm very impressed with how much you deduced from your own thoughts, which means you are probably omniscient. In that case, you'll have no trouble providing actual evidence backing your statements.