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bpev | 5 months ago

Probably simplicity. In my experience, SM2 has less levers, and is easier to implement initially.

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jarrett-ye|5 months ago

SM2 has less parameters, but there is not a systematic way to tweak them correctly. With the optimizer, it's easy to make FSRS adaptive to any learners. There is only one lever for user to tweak in FSRS: the desired retention.