At the end of TUC, the E-A was decommissioned. Would the ship be deconstructed and the materials used in the consturction of other ships? Or would the E-A just be relegated to the Starfleet Museum? If the latter, could the ship be reactivated, renamed and put back to work during a time of need (for example during the Dominion War)? If she was a new build at the end of TVH then she would have some life left in her, or even if she was another ship renamed then she might still be of some use by the 2370s.