Who can remember Concorde? I know i can, and Boom Supersonic most definitely does. The reason for that is that they are looking back at the Concorde and learning from its mistakes. The reason that the Concorde failed was high maintenance costs, too expensive tickets because of the fuel usage, and other factors like the Air France 4590 crash. It used approximately 6771 gallons of fuel per flight. A very high amount that made it difficult for the airlines to make a profit. The Overture from Boom is planning to solely use Sustainable Aviation Fuel (SAF), contrary to conventional kerosene. And since the 2000s flight technology has advanced drastically, and planes like the Overture don’t need to use afterburners to get to supersonic speeds which is a massive difference and part of what makes this project possible. But these speeds are slightly lower than the Concorde (Mach 1.7 - Mach 2.0) but is a much more achievable goal.