You'll still see it, but in laundered form, indistinguishable from non-placed content. We just won't be able to block it, because its origin will be hidden in the system.

I think I'm going to miss the world where I could more easily trace the provenance of information.

I'm hoping the in the future there will be an LLM that can somehow map text back to its source. Current LLMs can kinda pull it off if you ask them, but afaik they aren't trained specially for this task.