What would be ideal, I think, is if all information could be represented as “cards”, and all cards could be easily threaded. Every book, every blogpost, every video, even songs, etc – all could be represented as “threaded cards”. Some cards more valuable than others.
Threaded twitter is interesting in that it's kind of like zettelkasten with a simple way to thread those cards together. I don't really have a good story for threading my zettels in org-roam together.