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It's impossible to retain a skill if you dont use it. I've reached a point where I use AI exclusively for all tasks, because it's far faster and efficient to do so. What kind of activities do you do to retain cognitive skills?

Hey HN, I built Spin Lab: a browser-based interactive explainer for table-tennis spin. It visualizes topspin/backspin, spin rate, ball trajectory, bounce behavior, and why the opponent’s return reacts the way it does. I built it because spin is central to table tennis, but most explanations are either too hand-wavy or too static. Thanks Fable, we miss you