I'm not so sure, ground water will turn salty and make large swaths of land unlivable and river mouths will change stream upwards so all dike infrastructure as it is now will be unusable.
As a collector of things lost in time, such as Native American artifacts of which I have found thousands immediately around me in the last 15 years, I can say that erosion does have its benefits. Just as we are now reading from those exploring glaciers finding previous human tools and more. The word "benefit" here is clearly subjective.