"In Yui Shosetsu’s military instructions, “The Way of the Three Ultimates,” there is a passage on the character of karma. He received an oral teaching of about eighteen chapters concerning the Greater Bravery and the Lesser Bravery. He neither wrote them down nor committed them to memory but rather forgot them completely. Then, in facing real situations, he acted on impulse and the things that he had learned became wisdom of his own. This is the character of karma."
Personally, I'm all for taking digital notes as they are searchable and can be backed up. I think either way, the process of taking notes is more important than the tools.
[1] https://github.com/hollanddd/hagakure/blob/master/chapter-10...