It seems like the core things that Anki needs are new user experience improvements, and algorithm updates. SM2 really shows its age as compared to other algorithms.
For me really learning a word means:
(1) Knowing how to say it.
(2) Knowing how to write it, meaning the Chinese characters, of course.
(3) Still remembering (1) and (2) after at least a month.
(4) Being able to actually use the word correctly.
Do you really learn 20 words properly under those definitions? If so, then respect. I consider myself to have quite a good memory for visual information, but if I don't try to memorize 20 words as a full-time activity on that day, and write them hundreds of times, I am fairly sure they won't stick for long, maybe not even until the next day. Some obviously will, and some have good explanations why the characters look as they do, but others don't, and feel arbitrarily constructed.Would you say a native English speaker doesn't know the word "they're" if they keep spelling it "their" even if they use it correctly 100% of the time?
How does this opinion hold up if you consider that spelling wasn't standardized three centuries ago. Did no one know any English words until spelling got standardized in the 1800s? Do illiterate native speakers not truly know any words? Do children not know words?
How would your opinion change if you knew that plenty of native Japanese and Chinese speakers can't write the characters they can read anymore? If you don't have to physically write anymore, you lose the ability to write the characters. This is true of even educated adults in Japan and China. When I was a university student (I'm not Japanese), I could write kanji that my 30+yo Japanese friends had forgotten, but no one would say I knew how to use the words better than they could.
EDIT: And in any case, 10 new vocabulary words per day is extremely easy. In my experience having studied two foreign languages at the university level, that's pretty much the bare minimum expected to get an B in class.