Quote - I can't remember what the feature was called, or how to set it up, but Poser 7 introduced a new infrastructure for linking parameters in a way that would allow full animations to be controlled by a single dial.  I think the P7 native figures have some examples embedded in them, and Ockham released a script, IIRC, which can set them up.

But use of that would break backwards compatibility for Poser 6 and earlier versions.  Which is I suppose why no one seems to use the feature....

Guess you mean the ABC's (Advanced Body Controls). Victoria 4 has also some of those in the morphs++ package, the 'Morphforms'. Those are just cascading parameters and have no further correlation of limits etc. The idea is the same,  but what is discussed here is more advanced and realistic, and results in 'real' poses that can be saved and used for other figures.

One must ask oneself how much backwards compatibility one must support. We have moved forward 2 versions since Poser6, and if you do not make use of the new features why bother having them.
Poser Pro (and 8?) now have the 'teaching'  facility which probably does what Ockham's script did.