Erodible Mud Block

What I believe would be a cool idea would be if Mud blocks could get eroded. This would have a random chance of occurring during rainfall and is based on the idea of the rain washing the mud away. I think this would be a cool idea because it would allow for structures with a finite lifetime and having the landscape constantly changing is currently not widespread. It would also give a more natural progression for upgrading mud into packed mud. This is because the player may first try and build a house out of mud, see it slowly erode and then look for other materials that don’t have this drawback.