Why not have both? The answer is active aero, which is also expensive to design, implement, and test. Unless it'll be on a track, be cornering at >1G, or going

Why not have both? The answer is active aero, which is also expensive to design, implement, and test. Unless it'll be on a track, be cornering at >1G, or going >140mph, it's pretty moot. A cheaper car wouldn't do any of these.