The problem is that when DAZ copied Poser they couldn't/wouldn't re-ingeneer Poser rigging.

So internally Studio uses some sort of weightmapping that scales differently.
(Try the Figure Mixer in Advanced Studio and it asks you how to merge (freeze) the joint parameters of the combined figure: Poser falloff zones or vertex painting)

Only if you export the figure as a cr2 the "internal" weightmapping will be translated into (more or less) standard Poser rigging.

Now, that emulation is quite good, but not perfect (Fix morphs made using MorphLoaderPro only work properly inside Studio for example.)

But the real problem here is this:
How good is good enough ?

We now can use multiple capsule shaped falloffzones.
We have a morphbrush that works across joints.
There is also another tool in the works that will revolutionize the way JCM's are made in Poser.
Click: Export POSED figure to ZBrush
Click: Sculpt JCM morph
Click: Import JCM morph back to Poser.
And unlike MorphloaderPRO the results are PERFECT.

For 10 years I constantly heard people whining: Waaah, the joints are BAD ! Lookathershoulders ! Waaah..we want better figures !
Waaah..We want to be like the PROS !

Well, guess what ?
The tools are out there.
You can easily rig a figure in Poser now that brings tears to the eyes of any "professional" MAX/MAYA user.

But instead everybody now dances around a frigging Barbie doll that is five steps behind the curve because people insist on "versatility".

Well, people, I got news for you:
You can't have it both.
You can't morph from fat blob to Zombie with just a dial spin without things breaking.
You can't just go from toddler to teen with a "morphform".
Not of you have some quality standards.

This "versatility" crap is just a marketing shtick.
No, you don't need a new set of joints for each and any morph.
That's the usual propaganda nonsense like "Poser is brooooooken"

I'm all for easy and accessible for everybody.

But don't dumb stuff down because you think your customers are to stupid to notice.
And especially don't dumb stuff down just to rake in more money.

DAZ has changed direction.
From "artists tools" they went to creating "hobbyist toys".
"Easy", "versatile" and "convenient" is not the same as "highest possible quality".

Look at the crap merchants create for those figures.
Skin tight styrofoam clothing without a single wrinkle.

"Waah, waah, waah...it's too hard to rig and it don't makes enough munneeee !"
Well, perhaps you should go look for a job at McDonalds then.

This "Whatever it takes to bring in the cash" attitude stinks.
Make up your mind, DAZ.
Do you want to supply artists with artist tools, or do you want to be the Mattel of the Poserverse ?

No, don't answer.
Looking at V4, M4, and now Kid-4 the answer is quite clear.

Well, I just discussed this with a friend and I wrote him that after some re-thinking I'm actually quite happy that Kid-4 is such a dissapointment.
V4 is completely useless IMO, but M4 gave me new hope that DAZ would actually listen.
Had Kid-4 been at least as good as M4, I would have thrown out the 10 years of work I so far invested in my 3rd gen "family" and started over again.

Which would have been foolish as both the mesh topology as well as the mapping of the 3rd gen figures is way better than of those subdivided "new and improved" 4th gen figures.

But now I have a good reason to close the 4th gen chapter once and for all.