I'd think that sort of thing would be in a section on feature prioritization or scoping an MVC. I don't see a section like that in the toc, and it feels like it would be rather out-of-scope for what this is about. Not that I've finished reading the whole thing in detail yet.
Yes, I deliberately avoided to put feature prioritization or even personas or Jobs-To-Be-Done in the book — there are too many ways to do this and it is of no use if I write about one and the team/PM/company prefers another.