Spaced repetition is not super widespread. It’s popular among med school students and language learners, but frequently people find the benefits outweighed by the costs, the friction too high, and they stop. I believe the following are the most pressing issues to solve for spaced repetition to allow for wider adoption: Card creation: Zero friction card creation Card creation: Good cards by default Card maintenance: Eject bad cards quickly Schedule flexibility: Allow people to study more Sch...
