Jokes aside, I suspect future waterfronts would be unstable and potentially toxic, due to shifting land caused by the weight of the water, erosion from the flow

Jokes aside, I suspect future waterfronts would be unstable and potentially toxic, due to shifting land caused by the weight of the water, erosion from the flow, and landslides from weather and vegetation loss. On top of that, toxicity may be an issue in some areas as the water overcomes man made structures (eg roadways and basements) and systems (eg sewage and fuel delivery) that were never intended to come into contact with water. But still…someone will market it.