Earlier quoted context omitted.
That was simply an example of what's actually used in schools teaching adult immigrants of all ages! It was not something I pitched as an alternative to Duolingo. (Though it must be said that this particular school I mentioned has a very good track record in churning out able speakers, though this is not something a casual learner would want to try. It's basically full time. Very, very hard.) For language learning th…
I just wrote this in another comment, but the hardest part of language learning is the daily practice. Learning how the language works is the easy part. But only through the daily practice part do you develop the skills to read, write, and speak on the fly. So the question comes down to: what are you willing to do every day to get that practice in? Especially when you're a noob well under the level needed to do (or s…
Thousands of words and grammar rules that you need to grasp real time. Just mindless or Duolingo-ish daily practice doesn't take you nearly there.