[opk]

When I was studying in the late 80s / early 90s, the text books contrasted the "old" waterfall approach with the more "modern" iterative approach. That was long before Agile or whatever had been invented and recognised that there needed to be a feedback loop.

Trying to promote agile/scrum/xp/whatever by attacking waterfall is a straw man argument in my view because it is not comparing against what came before. That's not to say that clueless managers don't still like to reinvent and impose what is essentially waterfall.