"Stephen FPilot Bierce" wrote
I just saw another article on the "Popular Science" website about a
research program Northrop Grumman has been running with the goal of
quieter supersonic aircraft. Last year, they did some test runs with
an aerodynamically-modified F-5E Tiger II that were promising.
Perhaps they'll take what they learned and apply them to the YF-23
revival plan.

That's unlikely. The QSF techniques involve moving the shocks around to gain
cancellation. In the QSF F-5, that meant a loooong nose. It's unlikely that
you can have a QSF shape that's also stealthy.