It would be great to structure multiple content into folders on the board. For example, I have an aggregate note, I want to create 20 notes to it, but so that they don't all show up on the board at once.
So by creating one mega note, I can create nested notes to it, which are displayed in a frame that can expand and hide when I click on the corresponding item.
Now it's inconvenient when you have to create a lot of small, related notes under one large note, as if decomposing the meaning of the parent note.
This would be shockingly convenient for structuring notes, more convenient to work with the board, because the board is not overloaded, but there are lots of content still