They won't pull it. They will change it and you won't know. "Oceania had always been at war with Eurasia."
And then you solved the source of Truth problem because you got an old book?
Could be a wrong.print. could be a fake.
Bible is also not true just because it's some book.
All wikipedia history is visible.
If you're worried though, download a copy today :)
Then download today's copy of wikipedia...
My takeaway from the article is that it's more about the novelty and nostalgia, but also could serve a purpose--and that purpose is more about bad information being available online than about it going away.