I'm confused. Were you referring to some of your other playfield request threads? Or did you list some other playfields in the OP of this thread?

https://pinside.com/pinball/forum/topic/cpr-need-source-material-de-star-trek-playfield
https://pinside.com/pinball/forum/topic/wtb-bally-old-chicago-nos-playfield
https://pinside.com/pinball/forum/topic/cpr-bally-mystic-playfield-needed-for-scanning

[edit]: nevermind, another poster mentioned there was a long list in the OP of this thread originally. But the original post was only up about 2 hours

But it's not always the same people over and over. The hobby keeps finding new people and they get excited about getting new replacements for their old worn out stuff.

Then comes the lawsuits when they find out about it.

Yep, happened to me more than once. I was obviously a bit miffed about spending dozens or hundreds of hours on a project only to be rendered uncessesary because of changing needs or a better solution coming out before the completion of the project.

Transparent/translucent object aren't quite there yet.

I think you're misreading things here...

CPR hit the *pause* button on production in order to figure out how to proceed now that the art screens have been uncovered. These art screens would change the way playfields would be produced. Instead of scanning and re-drawing and re-coloring the artwork, the idea is that they can skip those steps and instead use the original screens to go directly to printing.