Obviously, the Enterprise-D wouldn't have been able to be upgraded to a Galaxy X in the prime timeline since it crashed in Generations.
But during the future of the prime timeline (around, say, the time of the "Picard" show), do you think Starfleet would've upgraded all remaining Galaxy class vessels to the Galaxy X class (as seen in the TNG episode "All Good Things")?
I'm hoping that they did. Just because something happened in an alternate timeline doesn't mean it couldn't have happened in the prime one.
But during the future of the prime timeline (around, say, the time of the "Picard" show), do you think Starfleet would've upgraded all remaining Galaxy class vessels to the Galaxy X class (as seen in the TNG episode "All Good Things")?
I'm hoping that they did. Just because something happened in an alternate timeline doesn't mean it couldn't have happened in the prime one.