Oh, I haven't seen orgmode before, so I don't know what its features are. I'm not planning to add evaluation of code blocks (apart from Math blocks that is) due to the complexity it would add.
Make sure to also look at org roam, it is more specifically why I won't personally have a need for Heynote any time soon, but it could maybe be inspiring for you going forward.
Essentially, it’s an environment for writing+outlining+task tracking+time management. It’s incredibly useful — you should definitely try it since you’ve used Emacs.
See the manual's table of contents: https://orgmode.org/org.html