[zelphirkalt]

A professor (taught mathematics) of mine once said, that "it needs to go through the hand at least once" and I used to think of that being an annoying attitude, but now I am more or less sure he was right.

Taking notes by hand is probably often a good idea. But you can still afterwards make them very clean in a document, also thinking about them again while doing that, so there is also a bit of additional learning in that activity.