The thing is, 90% coverage is not that great. What happens is that you understand common words that make up for a lot of structure, but when an uncommon word appears it's probably important to the sentence. For example, "son, if you go to the plumbf tomorrow morning don't forget to pick up some zlonks." 98% is closer to what you need in order to read a text and have an idea of what's going on. See this article: https…
Being fluent in Japanese as a second language, I agree with this. It's Zipf's law and sounds great, but 90% isn't as useful as it sounds. You'll mostly recognize a single common Kanji of compound words consisting of 2-3 characters, or common structural words. It's a far cry from being able to understand content you find in the wild. Also, "understanding" a Kanji is an ill-defined term. Most Kanji have multiple meanin…
Even at the beginning, learning the simple kanji, having the vocabulary I knew/heard living in Japan associated to the kanji made it very useful from the start.
For anybody learning kanji with anki, etc. and failing, I recommend giving wanikani a try. I am just a happy user. Disclaimer: I live in Japan, work in a mixed English/Japanese environment and speak simple Japanese w/ my wife every day