I thought that was odd, too. Rosity is selling several popular characters that don't use the DAZ morphs. Penny Dreadful. ADP's own "Just An Unbelievable Body." I wonder if the MAT files really only work for P5. You know how it is; even if it's labelled "For P5 only," some P4 users will buy it. And if it doesn't work, they'll be annoyed. Maybe Rosity didn't want that hassle.