The business model for a supersonic jet with no or very subdued sonic boom would be very different from that of the Concorde. A quiet supersonic jet would be able to service many more locations than the Concorde could, as it would not waste much of the time advantage in subsonic flight over populated areas. So with that, a larger fleet would be practical which would yield economies of scale. However, IIRC, the Concorde also needed an extra long runway due to its inherent marginal aerodynamics at low speed. I suspect most major hub airports are adequate, and the new design may be improved in this regard, though I doubt it. And the needle-like fuselage would still limit passenger capacity. But mitigating the boom does make a huge difference.
Interesting... read the comments.