Noone stops you from using the older meshes.

This was 20 minutes in Poser:

15 minutes for re-rigging V3's shoulders using weightmaps.

3 minutes for setting up the SSS using SnarlyGribbly's EZSkin.

And 2 for rendering. :-)

 

I like the result, but I still would want a fully working GENESIS in Poser.

Because what sets GENESIS really apart from other figures is its scaleability that allows it to go from adult to child and male to female and everything in between with a single dialspin.

Of course V3 could be modified in a similar manner, as Poser supports animateable joint centers and all the 3rd Generation figures are the exact same mesh anyway. So you could switch between V3 and M3, David and SP3, Aiko, Hero, Freak, Luke, Laura, Maddie and Matt just as easily as you switch between GENESIS morphs.

I'd really like to have such a V3 based GENESIS for Poser because of V3's higher resolution mesh, but unless some of the Python wizzards come out with an automated solution, adding all those various rigs to V3 manually and making them animateable seems to be quite a lot of work.

 

But just "fixing up" the older meshes a bit using modern tech is really no big problem.