Even with Agile and Scrum waterfall will sneak in
I've never quite understood, over 30 years of experience in software development, what problems Waterfall presented that warranted a complete refactor of software development processes such that things are now very much in cult-/cargo-cult  territory.There is a natural process that every issue goes through: Analysis, Specifications, Requirement, Design .. then the Developer takes in the materials of each of these steps, does an Implementation and Testing phase .. then the issue has to be validated/verified with a Qualification step, and then it gets released to the end user/product owner, who sign off on it.This is a natural flow of steps, and it always appears to me that the new-fangled developer cults are always trying to 'prove' that these aren't natural steps, by either cramming every step into one phase (we only do "Analysis" and call it Scrum) or by throwing away steps (Qualification?  What's that?) and then wondering why things are crap.Too many times, projects I've seen fail could've been saved if they'd just gotten rid of the cult-think.Its nice, therefore, to see someone else making the observation that Waterfall is a natural process and all the other -isms are just sugar/crap-coating what is a natural consequence of organizing computing around the OSI model - something that has been effective for decades now, and doesn't need improvement-from-the-youth antics.