> Waterfall is useless because nobody ever follows it. I agree that it’s sort of the “default” mode, but show me a project that didn’t go back and change someth

> Waterfall is useless because nobody ever follows it. I agree that it’s sort of the “default” mode, but show me a project that didn’t go back and change something from a previous step. The issue is not if they change something from a previous step but When and how often does this "checkpoint happen" You want an example of Waterfall? The SLS: https://en.wikipedia.org/wiki/Space_Launch_System https://en.wikipedia.org/wiki/Space_Launch_System in development since 2011 and most probably will get scrapped once it finishes becasue the market sittuation has changed completly since then.