Great topic. I think it might not be as much about the streak itself but the fact that it’s not adaptable to different learning styles and goals in general. For example, the “right” challenge can motivate and push someone to achieve their goals. But make it just a little less challenging or a bit more challenging and that’ll be enough for someone else to give up entirely, hence having the complete opposite effect. Of course, there are specific cases, like learning a language or an instrument, it’s important to do it consistently and every day, otherwise it’s very difficult to progress. But it will still depend on each person’s goals and I think giving that option for the user to be able to adapt the features to their journey is very important. Sure, it’ll give them accountability and responsibility to set up what works best for them, but extrinsic motivation can’t keep the fuel on its own forever without intrinsic motivation in any case. For example, I liked how SimplyPiano asked me to choose if I wanted to learn piano for fun or to master it, as well as asked me which days of the week, and how many, I’d like to practice. That makes it for a much more personalized experience, aligned with my needs.