Well, maybe not throw away everything, but I understand the principle. There are also other areas where this could help - and one of them is "naming". Sometimes when you start a project, you don't really know what the best names are for things. Project name, repo name, service name etc. So you choose something that you think it's ok and you go ahead. As the project progresses, you realise you've named things wrong, but renaming is so annoying and tedious. Often we ignore the bad names because it doesn't seem significant. But names are how people burden their cognitive load (an example, we named our repo after planets rather than describing what the repo does - "acme-customer-module-frontend" but we named it "pluto" - now everyone has to remember what pluto is and make sure pluto is not neptune).