To add to that, there is IMO a renaissance of “fuzzy” navigation, with macos’ quick search (the Sherlock/quicksilver clone), and tools like Obsidian spreading t

To add to that, there is IMO a renaissance of “fuzzy” navigation, with macos’ quick search (the Sherlock/quicksilver clone), and tools like Obsidian spreading the model of moving to apps and file by a set of partial keywords. I agree with you that a tree structure is important, the same way people still look at trees to navigate pages on most sites, going through categories, sub-categories etc.. More and more the tree is just dissociated with the actual representation, the same ways urls don’t exactly match the site structure on so many sites. I’d imagine the tags would have some hierarchical relations if we were to use tags exclusively.