> Even on the desktop, my "note-taking" app is just notepad on Windows, kwrite in KDE, and a very bare-bones text editor on my phone.

I've done this years ago in my .bashrc and use it almost daily:

      alias todo='vim ~/.todo'

I suppose I should change `~/.todo` to `/.todo.md` for syntax highlighting, but the list is already quite large and I'm not adding in anything that isn't absolutely required.