What's asm Metal rough by default in shader setting?

From the docs:

A new shader has been added, named Adobe Standard Material (ASM), which supports several features at once allowing to build more complex and accurate materials within a single Texture Set. With this new shader we also took the opportunity to add new channels to make the creation of materials easier as well.

• New Adobe Standard Material shader
  The new ASM shader is a shader that regroups several functionalities as well as an evolution of our PBR rendering. It supports at the same time:
  • Anisotropy
  • Clear coat
  • Sheen
  • Specular edge color
  • Additional subsurface scattering methods
  • And of course the other existing features such as Parralax Occlusion, Displacement,