I switch to obsidian from MindManager and OmniOutliner, where I heavily use outlining, mostly to easily re-arrange larger portions of text.
IMHO, the best from UX perspective solutions on the market are OmniOutliner (https://www.omnigroup.com/omnioutliner/) and Dynalist. They have plenty of features, but I think just two-three of them would make Obsidian a dream note taking app on the market :).
I have the following suggestions:
Enable drag and drop a whole folded section up and down (at the moment “swap line up/down” swaps only the one line, leaving “siblings” intact). It would be good to have some visual clue for (hook?) showing the possibility of moving a whole line (with siblings) > see Omni Outliner.
position a folding (triangle) mark just by the beginning of folded line (now they are always on the left margin), and add a light vertical line marking the folded fragment of text) > see Dynalist.
These are mainly UX features, but would make Obsidian a really killing app for someone used to work with large portions of text by outlining.
Just in case you didn’t know, the developers of Obsidian are the developers of Dynalist. You might want to search here and the Discord chat for examples of users using iframe embedding to include Dynalist in their Obsidian window.
Uppsss. My apologies. See: https://athensresearch.github.io/athens/
then click “Load Test Data” at the bottom and choose some topic on the left.
IMHO quite a nice approach,