I think this is key. There are studies that point to handwriting notes helping with the learning process, even if you don't end up using them later. I always found this to be true for myself as well — whether I'm in a lecture or doing some study on my own. I don't often go back to them unless I need to refresh on a single point. If I write them, I don't need them as much. If I don't write them, I'm usually having to study and read more and return to the references.

https://www.scientificamerican.com/article/a-learning-secret...