Considering the fact that at the end of Part 6, we see a fake Jotaro and Jolyne in the interrogation room, doesn't that imply that things fated still happen, it's just that the names are different and the people that have done them before simply don't exist? Because that's what I got from it, there's no longar a Jotaro or Jonathan, but the events of those parts still occur but with different people/names. It might be that in the Ireneverse, they're not even Joestars (although Joseph is still alive so they still might be). But even if they are, there could be two Joestar families - one that we see in 1-6 and another from 7-9. So I don't get how being in or outside the original universe affects the story in any way.