This is actually a whole new topic. I am not sure how to create a new one from here, linking them together, so if any of the moderators were to help me, I would be grateful.
We still have true dhamma which is mixed with untrue dhamma. This whole topic arose from the fact that maybe Pali texts are wrong and edited. So how is this pure dhamma? And I am not even talking about ideas of other schools that sometimes are the opposite of the Pali texts. So no, we do not have pure dhamma anymore. Every edit to a sutta is a stain on the dhamma. And you know there are edits.
The best we can do is: analyze, try to grasp the core ideas and practice as best as we can without trying to make it even worse by editing further.
So I do not see any proofs that the prediction is wrong, quite the opposite.
Have a look at SN20.7.
So what I am saying is: do not attempt to edit the texts anymore because you personally don’t like something in them. It is no better than those making those previous edits. It will just add more noise to the signal.