Except.... This isn't true. I can't just "turn on" adaptive headlights because the vehicle doesn't have the necessary camera to scan the road for oncoming cars

Except.... This isn't true. I can't just "turn on" adaptive headlights because the vehicle doesn't have the necessary camera to scan the road for oncoming cars installed. I can't just "turn on" adaptive cruise control, because my vehicle doesn't have the necessary front radar installed. I can't just "turn on" the HUD, because my vehicle doesn't have the necessary dash components physically installed. The number of different hardware permutations of most modern cars is eye-watering. For most options, if you didn't get it installed from the factory, you're looking at an expense retrofit.