“Sense” in that they’re actually close to sea level, maybe, but can you get flood rising sea levels insurance? Or will they all be literally underwater in a decade?

The bigger problem with those is that many were not developed with water and sewer systems, instead each lot has its own septic system and water well. These areas are actually too dense to support every home doing that, so people have started to run out of water. Now cities like Cape Coral are spending a lot of money to bring sanitary sewer and water to every lot.

The MacDaddy of them all is Cape Coral. The American Venice.