Victoria 4 - Stone Age (stone axe)
Genesis 1 - 2012 (TriAx)
Genesis 2 - 2013/14 (TriAx)
Genesis 3 - 2015 (DualQuat)
Genesis 8 - 2017 (Dual Quat)
I remember that I was a bit dissapointed when I first learned about Vam 3,5 years ago, because most of my DAZ stuff was allready Genesis 3 (I started DAZ with Victoria 4). I thought that was because of less licensing fees, didn't know that development of VaM started that early in VR-Age. Not to think of the brand new Genesis 8 that time, which only a few DAZ users had already switched to. If I remember correctly, upgrading to Genesis 3 was one of the first big community wishes, but nobody was really questioning why it has started with Genesis 2 that days.
So there is a big technological gap between Genesis 2 and Genesis 3, we all understood that it would mean a big efford to change and were more than happy that, instead of this, many new functions were implemented (like clothes, hair, custom morphs and textures...).