Interesting how we all use Agenda differently! I don’t think I’ve ever printed a whole project, as my notes in a project rarely make a coherent narrative. I tend to use Notes to record stuff and gather my thoughts. If I need to share something I find I need to write a new note that makes sense to others.
Actually, I have in the past tried using Agenda to write a proposal or report, based around a number of notes in a project. (I can see the pinned note formatting making sense here.) But the limitations of printing (to pdf in that case), described elsewhere in the forum, were too great to make it suitable for this purpose.
(Not arguing one way or the other - just sharing my use of Agenda.)