To be fair it has been over 40 years since the Concorde was designed and built. While I'm pretty skeptical that a start-up is going to somehow design, build and

To be fair it has been over 40 years since the Concorde was designed and built. While I'm pretty skeptical that a start-up is going to somehow design, build and deliver a supersonic plane I don't think such improvements necessarily have to be "magic". Plain ole iterative improvements over 40 years could probably handle much of that.