They don't include product discovery phases

The other thing you'll notice about each of these frameworks is they don't explicitly define phases for product discovery/ideation. Few Agile methods do, DSDM being the standout.  Instead, most prefer the team to manage this themselves. There are a number of techniques for doing so, including Design Thinking, User Story Mapping, and Impact Mapping.  We'll discuss these techniques later in the book in Chapter 10, Using Product Roadmaps to Guide Software Delivery.