Which transportation product innovation was initially rejected by the industry but went on to sell over 50 million units after a complete redesign focused on customer feedback?

The transportation industry has seen remarkable product innovations that transformed how we travel. Some companies made strategic decisions that catapulted them to success, while others created revolutionary products that changed the industry forever. Test your knowledge about one of the most significant product innovation success stories in transportation history!

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The Toyota Prius hybrid vehicle, which faced initial skepticism but became successful after Toyota incorporated driver comfort feedback in the second generation
Boeing's 787 Dreamliner, which was redesigned after airline feedback about fuel efficiency and passenger comfort concerns during initial testing
The Segway personal transporter, which was reimagined after initial poor sales by focusing on tour operator feedback about ease of use
Tesla's Model S, which was completely redesigned after early prototypes received negative feedback about range anxiety from test drivers