Here's a good question though that most people never bother to even think about, concerning all that alternate timeline BS.
If ST11 takes place in an alternate timeline, then why does Spock from the established timeline have to go back in time to stop Nero? I mean, regardless, according to the producers, the original Trek timeline is unaltered in anyway, so why would Spock bother with going back in time to try and stop Nero and fix the damage? Also, would Spock even be aware of the temporal incursion IF Nero did indeed create an alternate timeline, which wouldn't affect the older Spock's timeline?
Also, I don't think quantum mechanics explains those kinds of theories in the way the producers say it does, but I could be wrong.