instead of having your notes be siloed into different folders and subfolders, you can let your notes be automatically organized based on how they relate to similar topics and points. A lot of people like to use the brain metaphor in that the bidirectional nature resembles how our brains work and how it makes connections with everything that we are thinking and learning about.
2 Elsewhere in the garden
Notes that link to this note (AKA backlinks).
My time line posts contains a lot of backlinks to wiki content.
Blogs are, in many ways, the child of BBS culture and mailing lists. They are a unique innovation on that model, allowing each person to control their part of the conversation on their own machine and software while still being tied to a larger conversation through linking, backlinks, tags, and RSS feeds.