If you take a moment to observe the real-world interaction systems around us that have been used for some time, you'll notice they tell a story of past interactions. You can see the physical evidence of how users have interacted with them – like scratches and fingerprints. While some might view this wear and tear as a drawback, I believe it has several components that help make the UX better: Memory: Collective and Personal. These artifacts store the history of interactions. This storage system has a practical impact: it optimizes our cognitive load. When interacting with a system, it subtly guides you based on your past interactions. For instance, the most worn button on a dashboard often indicates the starting point of interaction. Insights: Pattern Recognition. Even with a system you've never used before, these signs of aging can offer valuable clues. They reveal interaction patterns through their imperfections. Take a beat-making machine as an example. The most worn pads – maybe those labeled "Kick," "Hits," and "Share" – not only show their frequent use but also guide you on how to interact with the device and which aspects of it deserve your attention. I made a prototype to understand how the idea might work on touch devices. I slightly exaggerated the "aging" effect. But it felt good. I think this approach would benefit spatial interaction systems more since it resembled real-world objects' behavior the most. #ux #uxdesign #interactiondesign #uidesign #ui #swiftui #prototyping