It would go down like this:
I have plain text note in one of my notebooks. I keep it in Evernote for search and reference purposes, but I originally used a desktop plain text editor, like Sublime Text or Visual Studio Code to write it (I like markdown).
Can't Evernote have a way to monitor that specific text file on my PC (Windows, but could be on any platform) so that, when I launch the Evernote application, it would check for changes on that file and update the note?