Obviously I'm biased since I built BrainTool because of my emacs/org use, but I also use markdowns and maintain the braintool.org blog on github in their markdown. I don't find it more readable. Maybe it's a familiarity thing, anything specific you dislike?
Anyway here's the definitive argument for org as markup of choice: https://karl-voit.at/2017/09/23/orgmode-as-markup-only/
It would for sure be nice to have a definitive spec to point to, independent of the emacs ecosystem.
BTW see below the first few lines of my dev-log.org file for yesterday. I think its pretty readable!
* <2022-03-30 Wed>
** DONE Today [83%]
- [X] Call w alex
- [X] Exercise
- [X] instructions to Alex
- [X] letter to Deignan
- [X] taxes
- [ ] styling for notes col
** DONE get rid of link in welcome topic, too confusing :dev:099:
** Instructions for running BrainTool locally:
1) Make sure you have git installed. (https://git-scm.com/download/mac)
2) Make a folder where you want to put the code