I think one of the issues here has already been touched on by the OP.  Most textures look like an air brushed Photoshop babe and I suspect that is what the majority of Poser users are looking for.  A lot of users are not in to portrait and a full length pin-up will not show much detail no matter how good the texture.

The reason I liked the 3DA Agatha was that the texture is clearly made to portray a slightly older woman with a few of the lines a life of experience would bring.  I really do think there is a market for more realistic textures but I accept that the appeal would be limited and thus maybe not as profitable as the 'run of the mill' textures. 

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.