I think the whole point is to not have hierarchical folders because they make it harder to see connections between ideas. But you can tag your ideas, or create

I think the whole point is to not have hierarchical folders because they make it harder to see connections between ideas. But you can tag your ideas, or create "folder" notes that contain list of other notes. And you can nest those notes or course, and even have loops in your graph, so it's more flexible than folders. Also, for static sites, I use Jekyll and I create a folder for each post in the image directory. It's very convenient.