I've seen it more than once, but I'm not saying it's common. But people saying "We do Waterfall" are saying "We're brainless, insane, or only working on trivial

I've seen it more than once, but I'm not saying it's common. But people saying "We do Waterfall" are saying "We're brainless, insane, or only working on trivial systems (in which case any process would work)." Once you start incorporating feedback loops, you're not doing Waterfall. Sadly, though, it is in fact a real thing. I've seen several projects fail spectacularly. One of the best failures was "only" a year late. They also learned not to go 6 months into development without integration (believing their plan was sound) and skipping testing for that entire time. It was either brainless or insane, and it took a lot of threats from customers for the PM to finally learn that, maybe, a plan made a year or more out and committed to wholeheartedly is stupid.