I completely agree on your first point!

I agree with your second point that Duolingo is a helpful tool. My issue is I've seen people rely only on Duolingo, then become frustrated when they realize they haven't made progress.

It's a good app for basics. But in terms of learning grammar and achieving fluency, there are not only different apps to learn that, but also different methods.

A lot of it depends on your first point. Some people binge Duolingo like they do a TV show and somehow expect themselves to absorb the content when that's not how it works.

Which languages did you learn by the way?

Teacher. Writer. Future Author. Aspiring Linguist. Progressive Voter. Twitter @ajkrow_writer.