How retro can I go? Sketchnotes: visual thinking on paper.

In the possiblyUsefulFoo category

http://www.core77.com/blog/sketchnotes/sketchnotes_101_the_basics_of_visual_note-taking_19678.asp

I'm already using a 35-year-old text editor (emacs, org-mode) for most of my thinking and
writing.    Why not go even more retro?