The Case for Writing Things Down by Hand
Typing is faster, but slower handwritten notes force a kind of summarising that helps ideas stay.
When you type a lecture or a chapter, it is tempting to transcribe nearly everything, because typing is fast enough to keep up. Handwriting is not fast enough, and that turns out to be an advantage.
Because you cannot write as quickly as someone talks, or as quickly as you can read, you are forced to decide, sentence by sentence, what actually matters. That decision — what to keep, what to leave out — is itself a small act of understanding. You are not copying; you are already summarising.
This does not mean typed notes are useless, only that they ask less of you in the moment. If you type, try adding a short handwritten summary afterwards: five lines, in your own words, with no notes in front of you. The friction is the point.