Which mythological product design principle is demonstrated by Hermes' winged sandals (talaria) that allowed the god to travel swiftly across realms?

Throughout mythology and folklore, gods and supernatural beings have created remarkable products with specific design purposes. From Hephaestus's automated servants to Thor's returning hammer, these mythological products showcase incredible design thinking. This poll tests your knowledge of product design principles as applied to legendary artifacts and how ancient myths reflected sophisticated understanding of user needs, functionality, and design innovation.

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User-centered design: The sandals were specifically crafted to address Hermes' primary need as a messenger god - rapid travel between worlds
Feature bloat: The sandals included unnecessary decorative wings that served no functional purpose in the design
Planned obsolescence: The sandals were designed to wear out quickly so Zeus would need to commission replacements
Competitive differentiation: The sandals were created primarily to distinguish Hermes from other messenger deities in the marketplace