Re: The operational status of NCC 1701-A...?
In TOS we know from a line that there were onlly a dozen or ships of that class. Of which we know for certain one under went a refit and 3 were lost in service. Leaving 8 or so unaccounted for. Sure the Enterprise might have been the most famous ship of that class but Starfleet could have determined that the class as whole from the TOS era had served with distinction and decided to preserve one of the other 8 as it appeared in the TOS era.
Starfleet could simply preserve one of each class of ship in the fleet Museum, sometimes if there are enough differenes between variants of the same class they preserve one of each.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.