Supersonics help most on long international flights. So that's the first focus. San Francisco - Los Angeles, so much time is spent on takeoff and landing that faster cruise doesn't help much. Hyperloop, self driving cars can help with these shorter trips.

As far as regulations, our first aircraft is much quieter than Concorde, and it will get quieter with future iterations. Altitude helps, but quieting the boom is mostly about nuances of aircraft shape.

Eventually, when you can get from San Fran to Tokyo faster than San Fran to New York, the rules will get updated.