This is not surprising. Memory works best with spatial association within spatial framework in physical world. - it's easy to forget stuff when walking into d

This is not surprising. Memory works best with spatial association within spatial framework in physical world. - it's easy to forget stuff when walking into different room, then remember it again when walking back. - having messy physical desk where every paper is "in it's place" underlined, full of doodle and remarks in the margins is physical "method of loci". - having a physical library where every book is "consumed and almost destroyed", means it's not neat but pages are full of notes and signs of use. Everything comes into mind when you take book and flip trough because you are handling physical object, smelling and seeing the traces of you reading it. - learning to write in hand for notebooks and not trying to be too tidy and organized is great for learning. You get both motor memory and spatial memory working. Contrast all this with sitting motionless in front of smartphone or laptop that is always the same. You see information trough window but are not interacting. Digital notes are just text you can read again with less association.