Outliners are surprisingly bad for managing todo-lists.
So what’s with OWL?
Well, er … yes … the truth is, I am now using OWL very heavily. Pretty much every day. And I am putting to-do lists into it. All I can say is, it’s working really well for that. Possibly because I don’t try to keep everything in one big hierarchy. But have different pages for different aspects of my life. So the to-do lists are rarely more than 2 levels deep. And I think the longest one is about 20 items.
It’s a really comfortable combination of geometries : easily navigable wiki pages at the large-scale and outlining at the small.