With low drag as a technical specification, the designer is forced ever closer to the 'amorphous-blob' shapes. A good thing in my book.
Since the forebody has the least impact on drag, veteran designers like Wayne Cherry of GM have commented that the nose of these cars can be used to establish brand identity.
Even a concavity on a BEV will produce zero aerodynamic penalty, as long as the perimeter radii just provides for attachment.
As they're non-ventilated, a stagnation bubble of dead air will just travel along with the car, producing a Prandtl flow sheet discontinuity of attached flow beyond it, as if it were a solid, convex surface. No foul.
