The XB-70 is a significant aircraft in aviation history, noted for its technological advancements and ambitious design. Its development during the Cold War pushed the limits of material science and aerodynamics, reflecting a unique era of engineering innovation. Despite its groundbreaking attributes, the XB-70 program faced criticism for its complexities and high costs, amounting to nearly 1.5 billion dollars for around 11 million dollars per flight. Comments from aviation enthusiasts reveal a mix of respect and frustration regarding the XB-70's legacy. Many express admiration for its design, while others highlight the persistent challenges of pushing technological boundaries in aerospace.