Author here, great point. Tony Fadell mentioned something similar in his Build book, about writing a press release before building your product. He mentions to

Author here, great point. Tony Fadell mentioned something similar in his Build book, about writing a press release before building your product. He mentions to pull the press release back out a few months into the project, and use the press release as a way to see what needs cut or what is critical to add. Or, if everything's changed too much, rewrite the press release. Scaffolding's a great example; it needs to morph as the project scope changes, but can also help set the scope (or at least direct it) at the start. At the very least, it gives you something to say ok, we're good to stop here, everything else can wait for v2.