I haven't seen the movie yet, but going by the Carl logic:
So if the original T-800 from 1984 or the T-1000 completed their missions of killing Sarah and John, would they then also try to settle down? Might be a little tough for the first one if he killed Sarah after the damage he suffered at the club....(The actual reason he wears sunglasses and has close cropped hair, but the sequels just kind of ran with that look)