How is it that 50 years after the invention of the Concorde we still don't have universal ubiquitous supersonic flight everywhere? The Boom XB-1 even solved the sonic boom noise issue and yet nothing is happening with the tech. Why isn't this being fast tracked by airlines and governments everywhere? And don't give me that bullshit about fuel costs being too high. Supersonic flight uses 2x the fuel at most and fuel is like 10% of the cost of a flight, so ticket prices would barely change. Most people would probably gladly pay 50% more for a plane ticket if it meant getting there twice as fast.