I asked pretty much this same question on DAZ and everyone was complete opposite of people here saying that yes she is outdated and not worth using.

I've noticed recently that vendors have started skipping V3 altogether, making supported items for all the mil3 and now mil4 figures, but they seem to skip V3... I think that's odd considering she is practically an unofficial standard when it comes to Poser or DS.  I even asked a couple Vendors when V4 came out why they made things for V4, Mike3 and Aiko3, but not for Vicky3, (obviously before the new mil4 figures came out) the response was basically there was no need to

My problem is, since there is so much out there for V3, why didn't they just upgrade V3 with V4 options and morphs, but still keep the ability to use the same clothing?

I'm sure you V2 users were at the same point when V3 came out.  Now all the mil4 figures can use the same clothing and textures, I'm sure it wouldn't have been that hard to figure out

In the end I guess it boils down to one thing, money...