I wish more of these systems allowed arbitrary indentation as a feature instead of just providing list items. I've gotten used to this in OneNote, and of course in plain text and Python. I don't want an outliner necessarily, but want to be able to indent a group of paragraphs and images with further indented sub-points, then outdent to move on to the next point.

Of course a lot of these systems don't support it because MarkDown doesn't support it. An indented block is a code block and that's it.

I started putting together a Tiptap editor project, which itself is based on ProseMirror, but got overloaded. I also tried building something with CKEditor but also ran into too much personal friction trying to get a simple project working. I have to learn Node and JS at the same time and it's a lot.