Originally Posted by Nordic1
However I completely disagree with your opinion about certainty. There are enough users on this and other forums that report their findings, and actions/reactions when a certain fault appears, specific to their vehicle or not.
Hm, I suppose this is a matter of semantics. For example, I am a few revisions behind on my PCM and TCM firmware. Some owners who have received those updates have reported problems, and I currently have none so I perceived no need to update. From my perspective, I will never be "certain that no other systems (besides the four that are being flashed) will be affected" in this type of multiple system upgrade--presuming we are referring here to adverse effects.
I suppose if you choose to define "certainty" as having a 95% confidence interval less than x% for these bundled S25 recall updates causing an issue in your vehicle (or something like that), then yes, you can probably be "certain" after collecting more user experiences.