100% agree. I've been using markdown for a few years after moving away from proprietary note taking apps. Although this has led to me developing my own short hand for many things in my notes. And have been looking at a way to integrate a to-do list with my notes with some Python scripts.

So while my notes may rely on some personal scripts to get there most value out of them, I strongly value that they are still plain text and I can always move them into a new workflow if I need to.