Spaced repetition systems have gotten better

I'm sorry, I didn't read the article but I thought my experience would be a good anecdote.

I've used Anki for multiple years and learned around 18'000 Japanese words. It's difficult to say but I'd say I've learned how to read around 5'000 kanji. When I studied in Japan, my kanji reading—don't mix that up with comprehension!—was way above everyone else's. And most of my classmates were either Korean or Chinese.

That's what 10 minutes of free time—I did that during my daily train rides—can get you! Keep practicing. Being ignorant is the first step towards becoming more knowledgeable.

Not buying at all that you learned 18000 words and 5000 kanji in ten minutes per day. Thats 60 hours a year for say five year, or 300 hours. Thats leaves you with about 70 words and/or kanji per hour or less than a minute per word/kanji. A rate which far surpasses native speakers.

Anki works, it doesnt need these unrealistic takes.