I wonder if it also had to do with the fact that handwriting is slower . Which means that you generally hold the concept in your working memory for longer than typing. Which often times does not require the concept to be held in working memory at all because typing speed matches reading speed. I also wonder if looking down at the page as you write vs looking up at the board. Constantly looking up and down is like a h…
I had a teacher who told us that when we took notes, we could not just transcribe what the teacher said - we had to take the ideas and write them down in our own words, because we would actually be thinking and learning and not just brainlessly writing it down.
I remember a math class that drove me nuts because the instructor used overhead sheets. Usually they were at least limited to output speed of their own hand writing so I could keep up but with the overhead protector I was always scrambling to even get it down.