the plot wa great for t1 too, i think if they sent t-1000 back to 1984, it wouldn't be ralistic becasue fashion would be different, everybody would be older...it neede to age realisitcalliy and assuming only a yaers development of t-1000 say sent back from 2030, skynet within second sfter t-100 was sent back realized like t-800, the t-1000 failed, so thusly made "improvements" (which were not...the t-1000 is tto tough an acto to follow, don't envy mostow in that way). it is a computer's way of chising a model based on it's sucesses and failures, thusly the end of the 600 series and thus the creation of the 800 series and thus the t-1000 and tx prototypes. Funny thing is they say the tx is more advanced, but they never actually say mor advanced than t-1000. They only say over the t-800. and to me, it seem between the t-800 and th t-1000, (t-1100) would have the ability to morph and emit photon beams and change into energy form senitent matter and warp much like a minature time machine, but would have major weaknesses in magnetic fields, etc.. It is likely an issue that when skynet sends a machine back and it fails, it generates an imprive model and tries again, without knowing exclty how the previous model failed, it's just being sytematic and sending th advance mdoel would not only mak ethe movie repeditive, but whole movei woul dhave been AMOST the same with some changeds like the the punching thru the windshield scene would have killed sarah quickly and the end of the movie would come fast and the beginning woul dbe just like t1.....in addition bieng syatematic,it mjust foqure that that time period may have had stategical problems so goes after john directly. and does so when hes' aboy. like i dais eveybody would be 12 years older looking too. This way is more feesbile. I agree with earlier comment regarding going further back in time. the term went as afr back as the files it hadwas only sure of the last known address and dates and cites. Remember, it didn't knw what she looked like nor where her mother lived, or they could have killed sarahs mom BEFORE sarah was born...so they ewnt as afr abck as they conclusinvely could and went from there. Yes it is jsut a movie, but detail are okay to discuss..free country and it's fun.