Comment by shmat

I studied French from 7th-12th grade in an American High School. After that, I could not understand any French beyond "bonjour". I could not have a conversation in French. I could conjugate verbs and I could read some. Fast forward 45 years and I retired and decided to actually learn French. I followed a very, very similar method and after 9 months of self study took a 2 week intensive course in France where I was told I was at B2 level. Obviously I didn't start at A0 but when I first started with Duolingo, I remembered nothing. 45 years is a long gap. What he describes works. Even an old fart like me can get to B2 level with self study if they are motivated and use good resources. It's never been easier to learn a language with all the excellent resources available.