what we can do is apply some common sense, however, and realize the amount of work to do this is ridiculous. and, yes, tacking the changes isn’t that complex, but tracking that many changes and storing them for tens of millions of users’ comments for 18 years IS. Then doing what you proposed with ChatGPT is beyond absurd with regards to cost, too, considering the scale of computing work required to process so many deleted comments.
so, despite how many theoreticals you propose regarding the possibility of it, the fact remains that it’s unlikely in the extreme such an effort would have been made because of the resource, time, and cost involved.
I’m referring to meaningful fighting for our collective rights, not fighting amongst ourselves— such as with petty contrarianism.