Optimistic UISo, Optimistic UI shows the final state the app finishes (or starts, even) the real work. It is a very simple concept behind a fancy name. Yet it can make a huge impact on your users' happiness (or "customer sat" if you are Apple). Firstly, it makes your app feel faster.https://uxplanet.org/optimistic-1000-34d9eefe4c05
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