INDUSTRIAL DESIGNERS: most textures go unnoticed, great ones get memorized
Mouse designers obsess over surface finish because your hand unconsciously maps it after a few hundred hours. You know exactly how much grip it provides, whether it collects palm sweat, if the coating is wearing smooth.
This is why changing materials between versions throws people off. You're forcing them to relearn a physical relationship built unconsciously over months. Their hand expects one thing and gets another. The new texture might be better but it feels wrong because their palm remembers the old one.
We talk about visual design language but tactile memory is just as strong. You can work in the dark and still know if you grabbed the right mouse based purely on texture. That's not learned behavior, that's relationship.
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