Q. Why is a wide horizontal tree superior way to work with a mind map that’s a pure outline (not a DAG) than a simple outline?
See the Data Format here, it’s an outline. Keystrokes are about moving nodes and descendants, that can work on an outline. And then why not have a portable outline format.
I do understand this is terminal/text. Yet there are plenty terminal/text outline editors, and being able to see a narrow outline instead of a wide tree feels more usuable.
That said, I use and really enjoy iThoughtsX which can import/export OPML and Markdown etc., and provides ability to control visual layout per ‘information geography’ or ‘cartography’. So not averse to visual graph depiction of a DAG, just asking why folks like this for pure outline format instead of outline editing?