Gonzo,

A simple $60 package is already in place that renders your arguement in regards to the clothing moot. PhilC 's Wardrobe Wizard is already setup for use with Victoria 4 and has been recompiled for Poser 7.

There are already several hair pieces that have fits for v4 already in place. 3Dream had free fits for his entire catalog released within 48hrs of release. AprilYSH has provided a free fit for he Sylphiad hair and Netherworks Studio has a complete fit system for v4 available for under $10.

Vendors already have the tools in place that takes those so called "wasted purchases" in clothing and hair, and makes them work with v4.

However, I do want to say that you do not have to switch over to Victoria 4 if you do not wish to. No one has to buy the model, there are plenty of Vendors out there still supporting V3.  I don't see her going away anytime soon.