Chosen answer:It's technology that works, so why not use it? People still drive 20 year olds cars now, some because they like them, some because they can't afford a replacement. It wouldn't be surprising for the new technology to be very expensive or patented by the military and therefore not available for everyone.
Question: In the final fight between T-850 and the new T-X, there is a nuclear explosion. But this is not behind the shelter door, it explodes under the door. How could John and Kate survive such a massive nuclear explosion?
Chosen answer:The explosion isn't massive, it is caused by the T-850's hydrogen fuel cell. The T-850 throws its damaged first cell out of the car window earlier, and it causes a mini mushroom cloud but not the same as a true hydrogen bomb, which would have destroyed their car.
Chosen answer: It's technology that works, so why not use it? People still drive 20 year olds cars now, some because they like them, some because they can't afford a replacement. It wouldn't be surprising for the new technology to be very expensive or patented by the military and therefore not available for everyone.