There are also environmental and legal factors to consider, and this article does a good job of explaining them.

https://aerospaceamerica.aiaa.org/features/supersonic-travel-dead-on-arrival/

Nothing is impossible, but I don't think Overture will ever come to fruition because of this. Now while the current US administration is, at best, very blasé towards environmental concerns, the rest of the world generally isn't. And with the constant back and forth cycle of politics, it is inevitable that the US won't remain openly hostile towards environmental regulations forever. Boom itself has also stated they are committed to being environmentally friendly.

Research on the subject is still developing, but so far the findings have not been promising for Boom. Then there is also the legal issue of supersonic flight over populated areas. The Concorde faced these same challenges and it ultimately killed the program. By the end of it's lifespan, it was effectively restricted to only making flights over open water. So to your point about economic hurdles, Boom will (ironically) need to ensure that Overture can operate over land at supersonic speeds without producing audible sonic booms.

They've already proven that it's possible to do that, but what they haven't proven is that it can be done routinely with a perfect success rate in all weather conditions. If they can't achieve that, public complaints about the noise will pile up and the Overture will lose a lot of the appeal of its top selling point. It could obviously still fly supersonic over water, but so could the Concorde. That wasn't enough to save it, and supersonic airliners as a concept, from becoming a relic of the past.

And even if Boom is able to produce "quiet" supersonic flights over land without any complaints from sonic booms accidentally reaching the ground, it still might not be enough. And that is also a HUGE if. Mach cutoff is real, but calculating it requires finding the perfect balance between air pressure, temperature, wind speed, and altitude over the distance and direction of the flight path. Maintaining it over the entire duration of a transcontinental flight and being able to do so hundreds of times with unwavering consistency is, in my opinion, pushing the limits of possibility to the absolute maximum.

But the reason it still might not be enough goes back to the environmental concerns. In order to maintain any sort of operational efficiency, Overture will need to fly at extremely high altitudes when going long distance if they intend to go supersonic. And as of yet, none of the environmental research into this has yielded good results for the planet. In fact, the results have looked quite damaging. I do believe that Overture still has the potential to one day fly commercially, but it will only ever be in a capacity similar to the Concorde. In order for Boom to bring Overture to complete fruition, they will basically need to create something with no carbon footprint capable of quiet supersonic speed.

I believe the development of something with those capabilities it is still within the realm of possibility, but not for Boom. They will overrun their budget, incoming capital from new investors will dry up completely, and the project will either be abandoned or acquired by a larger company. If supersonic commercial flights do become the way of the future, I would bet anything that the Skunkworks X-59 will spark their revival, not the Overture.