Org was designed for being a PKM-like system. Markdown was designed for README.md. It doesn't mean that you cant use either for the other task, but Obsidian for

Org was designed for being a PKM-like system. Markdown was designed for README.md. It doesn't mean that you cant use either for the other task, but Obsidian for example had to modify markdown significantly, to add support for tags, math, etc. It's just a shame that org format works really well only in emacs.