I am not trying to be a warrior for justice for anybody but myself, of course I will always fight when I feel I have been screwed over. I have worked for many companies over the years and when push comes to shove, they quietly want to settle rather than have a long, drawn out case, which drove me nuts because company had no fault in the owners stupidity except to have had a product in the customers home. I use nice up until they go to give me the shaft, then I gets mad and persistent. I refuse to be a sheep.
Lol. Ever dealt with GM? It may be that your definition of what a "push come to shove" is. I can tell you that I pushed HARD. REALLY HARD. Through many avenues. Did I get a small concession? Sure. Did they make it right? Nope. Not even remotely close. Over a period of many months.
It's dangerous to give people advice that could end up costing them a ton of money based on anecdotal information. The reality is that the business in question "MIGHT" fold. And they might not. It is absolutely a false statement to say that they will always "quietly want to settle". There are probably literally millions of examples where in fact that has not been the case. Is it possible that even more money and time in some of those situations would have finally yielded results? Sure. Is it also true that in many of those cases there was plenty of legal action but no yielded results. Sure.
The level of comfort somebody has to do this has to be based on their situation, and the FACT that there is no promise or guarantee that they will or will not get what they want. It is ALL a risk that they need to balance with their own situation. It's not about being a sheep. It's about being unemotional and practical.
While you may disagree, it is very easy to make the calculation look like this for the CP4 thing. You have to weigh the added $3000 expense (plus labor of you can't do it yourself) combined with the possible impacts of at least some warranty being voided for powertrain. IF FCA is willing to try and shaft a CP4 customer with claims of "bad fuel" (which we factually know they have tried) then it's hardly a stretch to think that they may well try to void a warranty for a CP3 conversion related to anything either powertrain or emissions. And in that case, at the very least you'd be delayed in resolving the issue - no doubt there. You "may" prevail and get the warranty claim honored but it would at least take longer and is absolutely not a certainty. That has to be weighed against the perceived risk of a CP4 failure (which may well not happen).
It's not a slam dunk.