There are several versions of a weightmapped V4 available and I use them when needed. But most pictures I make don't need it, so I don't see V4 as being "out-dated". It is still the most versatile figure there is for Poser in terms of addons (clothing, hair, morphs, skins, props, textures). 

Genesis in all its incarnations just has too many usability problems in Poser and is just difficult to work with if you do scenes with more than one or two figures. I occasionally use the figure, but often it is just not worth it.

I am still waiting for more options for Dawn, Roxie and other figures - especially in terms of morphs and skin sets. That is the main reason I rarely use them.