DAZ's HD data is encrypted. Unless DAZ makes the plugin that's not going to happen. I'm pretty sure if somebody makes a cracker to get the HD data out of DAZ figures they'll get a nasty letter form DAZ's lawyers and probably a subpoena too. G3 and up use a totally different bending system. The dual quaternion bending only allows 1 weight map per bone. To over come that DAZ is using multiple bones per joint. (one for each rotation.) They're also converting the rotation back to Euler rotations since most humans don't comprehend 4 axis rotations very well. All that makes baking those rigs for compatibility a real challenge. I suspect they're supporting Blender because it has a dual quaternion rigging system. Poser thinks in matrix rotations. (Not that Matrix) Both quaternion and rotation matrix do the same thing they just do it very different ways.

Once again ... Poser, Bondware didn't make the DSON plugin. We can't maintain it technically or legally. We will not cripple Poser's development to maintain compatibility with a plugin that's been depreciated and unmaintained for a decade. And yes, it would benefit everybody if DAZ updated the DSON importer to work with current figures and a version of python released in this millennium. If you think DAZ should update DSON, please tell them. They've been asked before. They didn't. Maybe they'll listen to you, their customers.