I wonder if writing by hand is the optimal output speed we can have, given our biological bodies. The information throughput (both in and out) are quite limited, we can only afford so much bandwidth. Anything beyond that and we lose some information. Writing by hand seems to be the optimal bandwidth that engages self-reflection simultaneously. Typing is good too, but I often find myself "think more" about what I'm writing if I do it by hand vs. if I type it.