My calender says its Juli 2015. Do you want SM to go back in time?

Conventional rigging + JCM's is the worst possible pollution ever invented in 3D. (But at the time, it was the only possibility, se let's forgive them)
That's why weight- and bulge mapping came in to replace the conventional rigging system.

As JoePublic demonstrated, there is NO need for JCM's if the weight and bulge mapping are done properly.

Someone wrote in anther post : "All tools are good tools to prevent JCM's and magnets, and whatever pollution one can think off."

And IF weight and bulge mapping can not get you exactly where you want to be?
Adapt the obj file untill it does.
The final result is always a combination of the position of the vertex in the obj file, and the weight it gets from the maps during bends.

Those who need JCM's and the other stuff, first need to learn how to rig properly and adapt the obj file if required.

Actually, you are misinformed. JCMs can be used in conjunction with weightmapping to improve the look of a bend. For example, if you want muscles to look like they're deformed, flexed or contracted when you flex a leg or bicep muscle.  This is industry standard technique when animating some figures. Weightmapping alone is not sufficient, as it will only fold a joint in half, not produce a natural bend.

Can you flex a muscle using a by a weight map alone? Most likely not. If you can, this is your time to demonstrate it. But you'll probably show those lo-res figures standing barely posed as an example. I can produce several examples of plugging in JCMS so that arms flex, buttocks squeeze and flex, on joint bends so that when they animate it gives more natural movement.

And Vilters, please pick an account you want to use when you post. Or at least use different phrasing (ie pollution) when you post.