Quote - I hope that is not the case...A lot of folk have a lot of time and money invested in V3 stuff! :0/

At the very least, there has to be a market for something to convert V3 stuff for use with V4!

Klutz :0/

I don't think I've ever had V3 prop or dynamic hair which I could'nt shape to fit V2 by adjusting the hair's base part tran, rotate, and/or scale parameters.  Sometimes you have to go into the PP2 file to "unhide" one or more of the relevant parameter dials though.  In the one or two cases where I couldn't quite get a skull cap to fit exactly right using dial settings, magnets worked for the fine-tuning.  I'm guessing many hair products will either have fit morphs built in, the fit morphs for some other character will work (or be close enough to fit V4), or some kind soul will publish some dial settings they've developed.  So I don't plan to pitch any of my V3 or V2 stuff yet!