The article discusses the improvement of spaced repetition systems, specifically the new FSRS algorithm, which uses machine learning to optimize the scheduling of flashcard reviews. This algorithm has been incorporated into the Anki software, making it more efficient and less frustrating to use. The article also compares Anki's implementation of FSRS to other language learning platforms, such as WaniKani and Bunpro, which use less effective algorithms. The author finds that Anki's use of FSRS has significantly improved their learning experience.