My favorite feature of the new $420,000, all-electric Rolls-Royce Spectre isn’t the cosseting ride quality or the illuminated stars embedded in the headliner of the insanely ornate interior. It isn’t the 577 horsepower or the 266 miles of range. It’s neither the “yes, that’s the spot” massaging seats nor the curbside presence of that upright, chromed front grille. It isn’t even the aerodynamically refined yet classically styled Spirit of Ecstasy statuette perched atop. My favorite...