> My wife quit Duolingo the week before this announcement after years of watching Duolingo prioritize attention manipulation over learning. She had a nearly 6-year streak and was on the paid version at the time, but realized that it wasn't actually helping her learn any more: she'd at some point begun maintaining a streak just for the sake of maintaining a streak.

I found the same thing with one of the meditation apps. I was just maintaining the streak, but not getting anything from it, after about a year. I can't imagine doing that for 6 years, so hats off to your wife.