The biggest problem with any kind of preservation demands is the need of massive amounts of money to be spent on first stabilization of the item then bringing it back to what it was. That’s what caused the problem with the SS United States passenger ship. The sheer amount of money needed the estimated costs just to stabilize her were in the 70 to 80 million dollars and restoring her well let’s just say they could build and fund any 10 extinct steam locomotives of your wildest dreams forever and still have cash leftover and only have done a quarter of the ship.
Heck Texas just spent IIRC 18 to 20 million dollars on drydock repairs on the USS Texas and the USS New Jersey had similar repairs done.