I tried Duolingo back before the pandemic was trendy, for maybe a year or so, to keep that streak going.
While I don't really feel that it was teaching me very well, I can relay this single anecdote. Duolingo has these stories that it figures you can read, based on the level of your scores. While reading a very short story in Spanish, I had the experience of the first time, a second language making me laugh because what I was reading, was funny. Nothing during my five years of 8th-12th grade did that. Just sharing, it's not meant to mean anything.