Not sure it’s a flex. Long time Duolingo user here, that streak-building addiction is real. It’s like i’m on the platform to hit my streak and much less to learn.

You’re describing the incentive strategy behind orange theory, general education, or any habit building app. Being addicted to self-improvement is generally a positive thing.

I wish my other apps invested more research engineers into optimizing incentives. Brilliant.com is great for learning, but builds no habits.