After completing the BASB Course, my understanding of the “Archive” is to get stuff out of the way of your active work. Conceptually, in Evernote that makes sense since it turns into long lists of folder and notes within. Tiago has used Evernote for many years, and has had to manually move things to the Archive often. The new tools such as Obsidian/Roam/Zettlr/etc completely remove that manual process from information handling.
I guess you could simplify the PARA concept down to just PAR and still get all the benefits from the original implementation.