Comment by vjerancrnjak

I’d say a missing thing is figuring out the order in which cards have to be shown.

Showing schlafen before ausschlafen, or contextually simpler cards before more complex ones.

Optimizing blindly easy medium hard and next time to show a card is probably very far away from efficient learning.

If the process is inspected, most of the forever knowledge that I acquired I heard once and internalized.