yep, that was about it.

See? That is the main issue; One company can not depend on another company.

Blender is open open S. they can do with Blender whatever they like.
DAZ can do with DS whatever they want.

SM can not depend on either of them, or you are turning out SR after SR after SR after SR, to keep up with everybody's "improvements" or changes.

Each company has its own rigging system, completely different, and can change, upgrade or update at free will whenever they feel fit to do so.

There is no, and probable never will be a "one size fits all".

And any "converter script" will probably become obsolete by the time is if finished and tested.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!