I’d broadly agree with this critique but I’ve had some success with Duolingo. About 10 years ago, I used it with the aim of learning enough Spanish to get by for a two-week holiday.
While learning useful language constructs (gender of nouns and pronouns, how to conjugate common verbs), I also had to learn some useless – to me – vocabulary, e.g., names of animals at the zoo. Anyhow, after a 2-3 months of using Duolingo, I had learned enough to be able to communicate with bus-drivers and shop staff. My conclusion was that Duolingo would be a useful tool to complement more structured learning.
I’m currently learning guitar and I feel the same way about Rocksmith: it’s a lot of fun and a great tool to incentivise me to pick up the guitar but it doesn’t substitute a more structured learning course and it completely neglects the theory of music.
While learning useful language constructs (gender of nouns and pronouns, how to conjugate common verbs), I also had to learn some useless – to me – vocabulary, e.g., names of animals at the zoo. Anyhow, after a 2-3 months of using Duolingo, I had learned enough to be able to communicate with bus-drivers and shop staff. My conclusion was that Duolingo would be a useful tool to complement more structured learning.
I’m currently learning guitar and I feel the same way about Rocksmith: it’s a lot of fun and a great tool to incentivise me to pick up the guitar but it doesn’t substitute a more structured learning course and it completely neglects the theory of music.