The things I've learned on this forum over the past 25 years just keep increasing. That's one of the coolest and most interesting things I've read in a long time.
I've no idea how sonic boom translates into wasted energy but it sounds damn' cool to me!
It’s basically keeping a vacuum alive, so get rid of that vacuum and that energy is no longer wasted. Spread it across the upper part of the wings and generate lift instead.
The Concord used an absurd amount of fuel to cross the Atlantic at Mach 2. About eight times the fuel per passenger than a 747 on the same route.
https://simpleflying.com/concorde-fuel-consumption/