I think this is a neat idea @hupp , and I would be interested as well.
Gitlab has a nice way of doing this based on tags. In Gitlab, each Kanban column comes from a tag. You can pick which tags become columns and arrange the columns in whatever order you want. Moving a “card” (aka a single Joplin note) from one column adds and removes the appropriate tags.
Not sure if this concept is too far out of the scope of Joplin, but a tag/column approach might make it more applicable outside of just Kanban.
