The fate of the Ship of Theseus is in this boat's future, if a hull can be said to be lucky. Considering that it certainly appears all the most costly technology was incinerated along with the island the main savings will be in the lower hull. To get that is a significant cleanup and detailed engineering evaluation, at least as complicated as the original design analysis for the structure. So they save the keel and the engines and the fuel tanks. About 10% or less of the cost of the original build. If it costs them more than that in analysis and cleanup? All it saves is the name.