Quote - further, you often don't have anything to learn without updates, new rigging, etc.  I mean, the difference between Poser 4 and Now is HUGE, and that's new toys.  Agreed?

A few years ago, there was a thread where everybody was posting their first Poser image and their newest to constrast what they learned over the years. While I agree that Poser 4 and current versions are worlds apart in terms of capability and realism, the biggest change I saw in most people's works was an increase in artistry. Their work was better less because of better software than that they got better at composing images and posing figures. The years of using Poser improved everybody's artistic sensibilities.

Older images had the straight on camera angle that is the Poser default. Poses were stiff and lifeless or downright physically impossible to replicate in real life. Faces were emotionless defaults. A lot of early work was outright awful. The newer images were more dynamic with interesting camera angles, more fluid poses, and expressions in the faces of the characters.

It takes time and practice to improve. The newer versions of Poser allow much better work to be created entirely within Poser. If the artist hasn't got a lot of earlier artistic experience, the end result is still going to be bad.

Here's an example of an early Poser/Bryce image created by Martin Murphy. It stands up well to things that can be done in Poser 8. Had Martin been using Poser 8, he would have had to do less postwork and would have had access to more existing props that would not have had to be created in other modeling programs. The dress would still have required postwork to have the specific flowing characteristics that are in the final image. There is only so much that can be done with the literalness of 3D work.
http://www.artsforge.com/martin/queen.html
In the end, better tools only facilitate creating better images if the artist has the skill to get there. Without the artistic skill, the better tools are just helping people create better looking garbage.

I'm not sure how many people will want to revisit earlier works. In my own case, I tend to want to do more new images than want to fix old ones. As is, so much of my time has been devoted to other interests that I'm not even getting new artwork done. Other people may want to try this.
 

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon