> For these reasons, I think the most realistic answer for the best way to learn language is private tutoring.
Based on my experience of language learning, I agree with you.
> The OP take about having used Duolingo for almost 10 years. That seems absurd to me. I would hope they have mastered at least half a dozen languages with that kind of effort.
Based on my experience of language learning, I agree with you.
> The OP take about having used Duolingo for almost 10 years. That seems absurd to me. I would hope they have mastered at least half a dozen languages with that kind of effort.
This completely glosses over the costs involved.