<ul><li>Transitional periods, like the evolution from horseless carriages to robotaxis, show the blend of old and new systems as people adapt to technological changes.</li><li>Design during these periods often includes elements that combine features of the past and the future, known as vestigial designs.</li><li>Vestigial designs are design elements from the past that have outstayed their usefulness but are still present due to familiarity and trust.</li><li>For example, the floppy disk icon used for 'save' in software programs is a vestigial design that remains from older technology.</li></ul>

Design for trust, then for possibility

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