To me, the main point was always the need to refresh the knowledge. Ive built a note taking webapp (http://rekowl.com http://rekowl.com), that will pop up some

To me, the main point was always the need to refresh the knowledge. Ive built a note taking webapp (http://rekowl.com http://rekowl.com), that will pop up some of your older notes for review, not unsimilar to anki. I have to say the experience is amazing. The retention improves, but also there's always a chance to update a note on a particular topic with some new knowledge and put links to other related notes.