Whether the Concorde was a "bad idea" is one of the most debated topics in aviation history. From a technological perspective, it was a triumph—it could fly from London to New York in under 3.5 hours at twice the speed of sound (Mach 2.04), a feat that hasn't been replicated by a commercial jet since its retirement in 2003. However, from a business and environmental perspective, it was often considered a failure. The Concorde was incredibly expensive to operate, consuming four times as much fuel per passenger as a Boeing 747. It was also plagued by the "sonic boom" problem, which meant it was legally banned from flying at supersonic speeds over land, severely limiting its profitable routes to just a few transatlantic paths. The high ticket prices (often $12,000 in today's money) made it a niche luxury for the elite. In 2026, as companies like Boom Supersonic work to bring back faster-than-sound travel, the Concorde is viewed as a "noble failure"—it proved what was possible but failed to find a sustainable economic model. It wasn't a "bad idea" so much as it was "ahead of its time" and lacked the materials science to be efficient.