Thanks, Ken and others, for explaining to a non-coder why scripts in Python 2 won't likely work in Python 3. When y'all refer to compiled scripts (pyc), I take it the problem is that no one can access (and thus modify) the original code except the person who wrote it and compiled it? So you can't just, for example, "uncompile" a script, make the necessary changes, and re-compile it?
I don't recall how long ago Poser started shipping with Netherworks' Pose Writer Panel already installed, but it seems to me that it's been updated in one of the updates since Renderosity took over Poser, based on file last modified dates. I'm guessing (or hoping) the Rendo team will also find a way to update Wardrobe Wizard and its many useful utilities.
What I really wish is that Renderosity would acquire the rights to include Netherworks' most useful scripts as part of Poser (or at least as part of a "Pro Pack" or something like that), so that they would also be in charge of keeping those scripts current and usable with the most recent version of Python used in Poser.
The Netherworks script I use by far the most often (like multiple times per day) is MAT Writer Panel, and yet I don't even use it to "write" material files, which is what its name implies is its primary purpose. Instead, I use it to copy single materials or a group of varied materials between objects, to swap out one or more image maps on an object, to make adjustments to Poser Surface attributes across all material zones on an object, to quickly make a material zone transparent, all white (shader nodes removed), or a random diffuse color, and more. I had previously used D3D's Advanced Shader Manager for some of these tasks, but it stopped working a while ago and it turns out I like MAT Writer Panel a lot more anyway.
I also use Pose Writer Panel a lot, but again, not for "writing" pose files. I mainly use it to quickly zero a figure's hands and/or all the actors along a single limb, as well as to copy poses between figures and to mirror poses (when Pose Symmetry doesn't work). For actually "writing" (saving) poses and expressions, I prefer to use Dial Manager, which gives you much greater control over what gets saved... and what doesn't! Dial Manager also has other nifty features, like the ability to change min/max values, limits, and visibility on multiple dials at once, which I find esp. useful when setting up a rigged prop or when "fixing" an older figure.
The third Netherworks' script I find invaluable is Creator's Toybox, especially the File Optimizer, tool which I use to extract embedded geometry to OBJ for both my own creations and those I've downloaded. It can also help resolve a variety of common issues in Poser files, including limits, 180º blowout, IK in clothes, and more. I also use the Mister Lister tool to create runtime file lists for freebies.
Since Pose Writer Panel is already part of Poser, I have my fingers crossed that the other two will be included in the future as well, as I'm certain many users would get a lot out of them.
I only recently got Netherworks' Spawn and have found it useful for setting up master control dials, although I already knew the basics of how to "teach" a master parameter to control other dials. I'm not all that clear on how JCMs work, though, so I got Spawn hoping it will help in that process once I get to the point of making clothes or a figure that will need them.
The only Netherworks script I haven't gotten much use out of is Scene Toy. I was looking forward to having a tidier and more powerful version of the Hierarchy Editor, but it's actually more restrictive than the HE when it comes to the tasks I do frequently. Then again, maybe I need to spend more time with it.
I love the fact that Poser (like several other 3D apps) can be extended by third-party scripts, as there will always be people who come up with specific functions that the application's design team never would've thought of. But I hate the idea that these scripts might just stop working one day if something about the scripting language changes. So hopefully script writers and Poser's new design team will come up with a solution to do as much "future proofing" as possible!