Not many things are automatic in research paper publishing… It all good old PDFs in which even the publication date doesn't always appear. You have to look up the title and find out in which journal / conference it's been published, and you get the date.

Anyway, it would not be fair to automatically invalidate papers citing retracted ones. Including:

- reproduction attempts

- some minor citation in related works

- it's usually not obvious that a paper is manipulated or even wrong without any bad faith involved

Now, I wish we could update papers with disclaimers and notes, but again, we are dealing with good old PDFs that are never going to be updated…

Good luck even noticing that a paper was retracted.

I wish we had better formats and publication processes.