But obsolescence also occurs when the needs of the consumer change, when the functions to be performed by the product are themselves altered. These needs are not as simply described as the critics of planned obsolescence sometimes assume. An object, whether a car or a can opener, may be evaluated along many different parameters. A car, for example, is more than a conveyance. It is an expression of the personality of the user, a symbol of status, a source of that pleasure associated with speed, a source of a wide variety of sensory stimuli—tactile, olfactory, visual, etc. The satisfaction a
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