What I never inderstand about articles that talk about very distant objects: they always use "are" as if this large structure would be there now, when, if at all and we interpret the data correctly, it was there billions of years ago. Something that "stretches" over 4 billion ligth years may also (depending on in which direction it stretches) also stretch over a time span of at least 4 billion years.
It is weird to think that what we see is not our universe at all: it is a picture that is a collage of times of what the universe was.
But what does it mean about our understanding of the universe now? Obviously we have no idea if Quasars "exist" -- the ones we observed so far are at least 600 million years away and thus have existed 600 million years ago.
600 Million years is a very long time. But 10 billion years is much closer to the beginning of the universe than to now. Does this make the violation of that "principle" then even more or qutie less significant?