Ike washed away a substantial part of the Bolivar Peninsula in Galveston County, Texas. Many of the structures had survived numerous tropical cyclones, but the unique nature of Ike led to almost total devastation. Where in the past a few structures would have damage that could be repaired, large areas were left with nothing but a few piers standing in large areas of sand. Entire sections of highway were washed away, and the bridge at Rollover Pass required substantial repairs.
I have a feeling the final toll of Ian will be similar to Ike. Those that have the resources to rebuild may make the effort, but if it's like the aftermath of Ike, many have had enough. Rebuilding is a terrible experience. And if there is no money to accomplish the task, walking a away is the only option. Those with the resources may just take the insurance money and apply it toward another property far from the coast.
One good thing about the aftermath of Hurricane Ike was the demand for more substantial structures, and the awareness that regardless of the cost, the insurance required is necessary. Unfortunately, such things are expensive, and beach property becomes something only the wealthy can afford.