Agile companies sell the fear that You're Doing It Wrong.
What resonated most with me from the satirical piece was:
> If you ever see a software product with a copyright date before, say, 2001, it is a work of fiction, placed by The Great Cunningham to test our faith.
I've read accounts of the 1980s-ish days at MS, Apple, VisiCalc, and other software companies.
So far I have yet to read one which used waterfall.
Modern Agile proponents seem to define Agile as "not-waterfall", so I guess Wozniac's Integer BASIC in the 1970s was developed using Agile methods. /s