Did more how?
There’s not much difference between his system or many others over the past several hundred years. Compare Ross Ashby’s journals & indices http://www.rossashby.info/journal/index.html or Jonathan Edwards’ Miscellanies https://twitter.com/matt_everhard/status/1466483468494323718.
Luhmann used his more aggressively or efficiently perhaps, but we really need to stop idolizing only him because of our availability heuristic bias. Why not lionize Isaac Newton for his use (he called his a waste book), or Gottfried Wilhelm Leibniz who used a wooden cabinet to create his system? And these are just a subset of examples of prominent mathematicians related to calculus.
A note cabinet pictured in De arte excerpendi (1689) by Vincentius Placcius on p155 similar to that used by Leibniz.
The note taking traditions everyone is writing about and re-discovering go back further than most are aware. As Dave Rogers indicates “We’ve been yak-shaving for centuries.”
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