After using Medium for a little bit and trying to carve into clay with various stamps in the shapes of traditional clay tools, I find it really difficult to carve into a shape because there is no resistance to the strokes that I apply. I end up with deep gashes instead of nice rake patterns I'm trying to achieve for example. If I could set the hardness of a layer to mimic the effects of cold stiff or warm soft clay then carving detail onto a model might work much better. Additionally, if I set the clay tool to add clay rather than remove it, then the pre-existing clay would resist the addition or adhesion of new clay on its surface mimicking real life once again. I can imagine this hardness setting helping the other tools such as the move, inflate or flatten tools in a similar fashion.