Aesthetic or psychological obsolescence refers to the state of being outdated or no longer desirable due to changes in cultural or societal norms, preferences, or trends. It is a form of obsolescence that is not based on functional or technological advancements, but rather on the perception of what is considered attractive or relevant in a given time period. This can apply to physical objects, such as fashion or design, as well as intangible concepts, such as beliefs or attitudes. Aesthetic or psychological obsolescence can lead to a sense of being out of touch or irrelevant, and can often drive individuals or industries to constantly adapt and evolve in order to remain current and appealing.