I don't know why you would expect Duolingo profits be helped a lot by AI. Their profits going up and down are more about how much then enshittify for free users

I don't know why you would expect Duolingo profits be helped a lot by AI. Their profits going up and down are more about how much then enshittify for free users - basically tradeoff between long term success and temporary profits. AI does not change that balance. You can enshittify and profit quickly or not enshittify and keep long term engagement. AI announcement annoyed some people, the slop translate courses were, well, slop. That is the extend of the change.