Have we ever been working by the Waterfall?

Great article! Interesting view on the Waterfall approach. You mentioned that Agile didn't bring anything revolutionary to the world, though I think few things from it are quite effective, yet in a right management system. For example sprints and daily standups. I think this is one of the success points of Scrum as an Agile approach. It's important to ensure communication through various channels, and with Scrum it was possible even during the pandemic. Many companies moved to slack standup bot to maintain the effective communication even on a distant work. I think the Waterfall does not emphasise communication that much which might be one of the problems with it.