I'm a recent convert as of this year! However, (and I don't know if this will surprise people, I suspect not) I actually use it primarily for org-mode, for note-taking, to-do-lists, documenting and thinking through small bits of code that require careful thought.

It's also my version of powerpoint, e.g. recently I was sharing my thoughts with someone and made use of folding to guide the ideas I wanted to communicate to them. I use VSCode for code.