And you do?
For civil use, it is the airlines that dictate whether a project will come out of the developmental stages and into full production. What are the maintenance requirements of this new jet? You are not talking about what the manufacturer can do but what about the airliners can do with bare minimum ground crews at various destinations. Financially and economically, the Concorde was a disaster precisely because the airliners refused to maintain it. The Concorde existed for as long as it did thru the taxpayers.
https://www.theatlantic.com/technology/archive/2015/07/supersonic-airplanes-concorde/396698/
Who is going own this latest SST? Airlines often lease -- not purchase -- their jets. This leave owning this latest SST to an exclusive few. And if enough airlines, after their numbers crunching, decides that the financial returns are not there, this SST will not go beyond the developmental stages.
Maintenance is unknown. For any airline, an idle aircraft is a money losing situation, especially if the aircraft is leased and not owned. This means the maintenance for this new SST cannot be more specialized than what is currently happening at all airports. This ranges from passenger access to refuel to luggage loading to minor troubleshooting of minor issues.
Is there a need for this time saving flight? So far, the flying public has not expressed sufficient interests in transoceanic flight in a couple hrs. Sufficient interests as in sufficient paying customers outside of the millionaires club. See the Concorde for example. Currently, supersonic flights over population centers are forbidden. That public sentiment was expressed in laws. That leaves transoceanic flights as one financial source. Possibly the only one. Further, even when the Concorde was flying, the millionaires prefers privacy over speed. So they saw the Concorde as nothing more than a novelty that they maybe use once in a while and fly subsonic in privacy for business and pleasure.
This latest SST design seems to be nothing more than a science project rather than a serious exploration of the SST as a viable business venture.