Joël and Sally examine the simpler components of programming and why using basic data structures may not always be the best approach to solving a problem.

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Primitive obsession is a code smell where developers overuse basic data types (strings, integers, booleans) instead of creating custom types or objects. The discussion covers how to recognize this pattern in code, its drawbacks including reduced type safety and scattered validation logic, and strategies for refactoring toward more expressive domain models. The hosts explore when primitives are appropriate versus when custom abstractions improve code maintainability and readability.

494: Primitive Obsession