The history of the automobile is filled with bold ideas and ambitious vehicles that, for one reason or another, never found the success they deserved. Some cars dazzled with their innovation, while others won hearts with their unique charm—yet fate, timing, or market missteps sealed their tragic destinies. Despite their promise, these vehicles were overlooked, misunderstood, or simply arrived before their time. In this article, we revisit 15 remarkable cars that were full of potential but ultimately met with disappointment. Their stories remind us that in the automotive world, greatness isn’t always rewarded—and sometimes, the most interesting cars are those that never got their due.