If you have a hundred backup copies of your mind all over the solar system, what do you care if one of you gets killed? How can you possibly write a plausible plot that includes a weakly godlike AI that doesn't involve it instantly solving any problem that faces the protagonists? How can current audiences relate to a world where the population of the Earth is 100 trillion, all of them running as uploaded minds on computers?
(Disclaimer, I'm not a fan of Star Trek: http://bbot.org/badtranscript-startrek2.html )