I really don't understand the conclusion, based on your premise (which I'm also at odds to figure out). You want to see all of your notes "contained within one notebook" (even though they're really not; btw, the phrase "tagged explicitly for the notebook" doesn't really make sense in the Evernote world: tags are not notebooks), but somehow this implies that nested stacks are the solution? I don't follow; if you want to see all of your notes, then just use the "All notebooks" feature. You don't need nested stacks for that.That being said, I do understand that many folks would find nesting of stacks (or notebooks) useful. It's just not clear to me how your example supports that usage. Did I miss something? I was all on the Nested Stacks bandwagon, but in making an argument against tags, I had to explore them. I'm now ignoring notebooks and focusing on tags. They let me create as many layers of nesting as I want like Outlook folders or file folders, plus I can have more than one tag on a note, so it can be associated with more than one concept. Downside, at least in the desktop app, is that with a stack, if I click on the top level of the stack in the sidebar, I can see a list of all notes in all of the stack's child notebooks. If I click on a parent tag, I don't see all the notes in its descendant tags. I think if showing notes in a tag's descendant tags was possible (maybe a setting users can toggle), it would make the tags more useful and better fit the scenario zuzubeas is describing.