For mathematics (my field) or something similar like theoretical physics, the pace at which the lecturer can write on a blackboard with a piece of chalk is just about the right information rate for the audience to absorb. Not to say one cannot teach well using more modern media, but it has to be done with careful thought and planning to be effective. (Same applies to lecturing at the board; we just have more practice at it.)
As for note-taking, I used to write everything down in class when I was in college & grad school. Sometimes this worked, sometimes not -- what's right for a course in abstract algebra isn't going to be right for a course in computational neuroscience. What I think is very effective, but requires some discipline, is: - take minimal notes (or even photos) in class - reconstruct lecture after class - go to office hours and clear up any questions that arise. It would be hard to do this for everything. For the subjects you really care about, this might be a useful approach.