WHY DIDNT JOHN AND T-800 DISAPPEAR AT THE END ?
Terminator series is heavily based on logic and physical facts. The movie is not an 80’s comedy like “Back To The Future” to do such things, that would be illogical and a complete cartoonish fantasy. Physics tell us that there’s cause and effect. If you remove the cause, the effect will not happen. But if you remove the cause AFTER the effect happened, the effect will still be there, simply because it’s already a done physical object or event. There is no rule or any physical or chemical elements that would cause it to evaporate, that’s just ludicrous.