I definitely agree. Also wanted to link to a related request I made: Hotkeys to fold/unfold levels below and all but current
Speaking of Onenote, I think Word’s Outline Mode could be an inspiration in the ability to only show or hide list items by indent level: Filter lists by indent level. Not sure how Obsidian might do this as it depends on styles. Perhaps a plugin could take advantage of headings under the hood to accomplish this, although I have nothing to base that on.
Good idea. Thanks.