Anki works, it doesnt need these unrealistic takes.
Actually, it took me 20 minutes of time per day to do my reviews + new words. I had, on average, 200 cards to go through daily (180 review + 20 new cards).[1] Going through 18'000 words took me around 5 years. 5×365×20=36'500
> A rate which far surpasses native speakers.
Are you comparing me to babies? It took me 2 weekends to learn all kana, but it takes years for a toddler to learn just hiragana. It's not a fair comparison.
> Anki works, it doesnt need these unrealistic takes.
I wonder why you think it's unrealistic. It's not like I'm a genius or anything.[2]
[1] Two cards is one word; one for English -> Japanese, one for Japanese -> English.
[2] Some teachers definitely thought I was a genius because of my memory, but it was all thanks to Anki. And proof is that I was absolutely bad at text comprehension. Anki doesn't make you practice that.
So, by my calculations for just the Anki time alone it's about 17.5k words split across 730 hours, which comes out to about 23 words and hour or one word every 2.5 minutes.
I've seen a pretty wide variety of people do Anki, and I can say there's a distribution in length of time per card for basically the exact same types of cards among people. The slowest people average around 3x slower than the fastest.
I did the exact same Korean deck as my wife at the exact same time. It was wild comparing our stats in real-time. It would take me 10 ~ 12 seconds to do the same sentences that it would take her 30 ~ 35 seconds.
Now, those cards weren't alone - they were reinforcing content that I'd learnt in lessons. But if they were doing it for 10 minutes a day a few times a day, it seems quite plausible to me.
...Maybe the poster meant "«10 minutes» per ride"? («That's what 10 minutes of free time - I did that during my daily train rides»)