@bhawthorne As others have mentioned, do check out Kiwix - https://kiwix.org/en/ - You can grab an offline copy of Wikipedia and many other websites. (I’ve done so for when Internet access goes down… but you make a really good point to have one at a point in time before the LLMs started generating so much useless text.)
@danyork Seconded. The current English Wikipedia with pictures compresses down to around 100 gigabytes in Kiwix .zim format. They also have a BitTorrent file share of it, if you don’t want to run up Kiwix.org’s server bills.