The supersonic wing is also terrible at subsonic speeds, meaning it takes a terrifying amount of fuel to push it up to altitude and supersonic. Military supersonics deal with this by getting a drink from a tanker after takeoff.
As for aerodynamics, the F-22 is relatively efficient at high subsonic speed and also doesn't require external tanks like earlier jets do.
From a little further reading it seems it seems that supersonic turbofans are actually just the apex of the continued sophisticated work being done on jet engines which has allowed them to push the intake fans of low bypass turbofans up to supersonic airflow speeds.
Naïve question, I know. Just curious...