I’ve been using SuperMemo for almost 16 years, every single day. I can’t think of a better way to guarantee that I will retain stuff outside of using some kind of algorithm to tell me when to refresh desired information. I think of it more as “computer augmented memory” rather than “I’m letting the computer think for me.” I use it in the morning to review my cards but other than that I have little interaction with it (until I add more cards, which happens during periods of down time)