[phailhaus]

I think fractal designs are the way to go! My favorite notetaking app is Workflowy which does this exact thing with nested lists, and it supports boards too! One thing I would suggest is that it needs to be possible to "peek" at lower levels; it's a bit jarring to drop a card on another card and have it completely disappear. It's not immediately obvious that the card actually went "inside" the right one.

[efojs]

Thank you, yes fractals rule the world (literally?). Seen Workflowy, didn't use it, but it looks rather easy to use. And final text is readable. It's important.

I plan to add view/export of board as a text, so it can be read as a whole.