I hardly ever use V4 or M4 anymore, unless I want to use Carrara hair items that grow directly on their models. Using Daz Studio to convert older content to wearable presets, I have converted over 100 items for V4/M4 and dozens of items for older figures for use with the Genesis 2 figures. Once exported as a wearable preset from Studio, the ability to load as a figure in Carrara and then mix and match across figures and content is amazing in my experience.

For example, I have loaded 2 G2Fs and 1 G2M. The G2Fs have been shaped to be Stephanie 5 and Mei Lin 6. The G2F/SP5 has skin based upon the maps for Eruana 6. The G2F/MeiLin6 has skin based upon the Saki character for Mei Lin 6. The G2F/SP5 is wearing a maid outfit for Vicki 3 by Pretty3D. The G2F/MeiLin6 is wearing a maid outfit for V4 by Pretty3D. The hairs are for V4. The G2M has been shaped to be Michael 6. The G2M's skin is based on maps for the Garen character. The G2M's clothing is an Edwardian suit for David 3

Using Genesis 2 figures and their clones, I am able to mix and match content from V3/M3, V4/M4, V5/M5, V6/M6 and more. I have even used Poser's Wardrobe Wizard to convert items for P7Simon to M4 and then to Genesis 2 male.

Just one person's experience.