A person who commits anachronisms, or someone whose ideas or style belong to an earlier or later time period than their own.
From anachronism plus the agent suffix '-ist' (one who does or practices something); literally 'one who commits temporal errors or lives in the wrong time'.
Anachronists exist everywhere—from people using outdated technology by choice (vinyl records enthusiasts) to people living with ultra-modern tech (cryptocurrency pioneers)—showing that time moves differently for different people!
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