Which 1980s product failure was so catastrophic that it became a business school case study on 'why you shouldn't mess with a successful brand formula'?

Throughout retail history, certain product failures and marketing missteps have become legendary cautionary tales. These historic mistakes have shaped modern business practices and taught valuable lessons about consumer behavior, market research, and brand positioning. Test your knowledge about one of the most significant retail failures that fundamentally changed how companies approach product launches and rebranding efforts.

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New Coke (1985)
Apple's Newton MessagePad (1987)
Colgate Kitchen Entrees (1982)
McDonald's Arch Deluxe (1986)