- Cars did attack people. There was the pizza delivery VW that crashed into a tree killing the driver, which Deke sees when bicycling through the town and the lady who was killed by her car's automatic window when the heroes reach the pier and the one guy stops to steal the diamond ring from her finger.
- Well yeah, they CAN, but with a limited number doable at a time, they prefer the trucks.
- It's like how your Wi Fi router can only handle so many devices before connections start getting spotty.
- Possibly the force was preferentially animating vehicles that had a full tank of gas over the ones that were nearly out of fuel, since the former could get more done before running dry. Which explains why so many trucks became animated at the Dixie Boy, but not the cars of the Bible salesman or the honeymooners: the truckers had routinely gassed up their vehicles upon arrival before they stopped inside for lunch, but the salesman rushed in without filling his tank because he was chasing Brett, and the couple were running for cover when they arrived after a long time on the roads, so were running on fumes.
- Alternatively, they may simply prefer larger vehicles, since they can do more damage.
Simply put, the machines ARE alive because of the comet and not because of alien control. At worst, the aliens were just neutral observers. At best, they were beings who had something similar happen to them on their world and came to help humanity. The comet itself may have sentience, noted the UFO, and directed a satellite to fire a nuke at the UFO to prevent the aliens from aiding humanity. The ending line "The survivors of the Dixie Boy are still survivors" means that the machine menace is STILL ongoing.
- Except for the book, Christine was hinted to be active as far back after 1958 (the year the car was manufactured), as the car was suggested to be responsible for the death of Le Bay's child and had incredible abilities outside of self repair (in the book, there's a recounting that a group of Lebay's friends picked up Christine's rear end off the ground when George tried to leave, only for her roll forward on her front wheels, degloving the skin on one of the fingers on one of them).