I've been intensively using Orgmode for a year and a half (wrote my thesis in it) and then abandoned it to switch to Markdown.

Orgmode quickly turns into not-quite-plaintext with humanly impossible to read and very distracting data structs stuck inside the text. I think these were called "Properties"?

For me the beauty of plain-text is that it can be read and written in any Editor without needing syntax highlighting. Here Orgmode fails for me, as I found it unreadable and unusable without an Emacs-esque toolkit.