That is more then just writing hello word. That is equivalent of "taught me basic programming, so I was able to write my first javascript game and continue learning by doing own projects". That definitely has large value for someone at 0.
It literally is maybe not by your metric but someone elses metric that can absolutely be a success. Sometimes getting up in the morning is a success for people I've been there I know what that's like. I'm kind of amused at the gatekeeping of what a 'success' is here. Guy said he has literally learned things that have stuck with him sounds like something he marks as a success to me, not like he was taking the course for college credit and had to demonstrate fluency lol
edit: yea the guy is now consuming media in a foreign language and has had small convos based on what he learned on duolingo. idk man smells like success
"anyone who's done even a modicum of research knows that holding a conversation... reading literature, consuming media...duolingo isnt going to do these things for you."
Your edit makes it sound like not only did I argue that what he did is not success, but that thinking so was dumb, while we both thought the same thing five minutes ago. In fact I argued that beginning a task does not constitute success in that task.
If OP is not exaggerating his success that is highly impressive and hard to believe, so good for him. That had nothing to do with anything else I said though.