"All of human knowledge"? Let's think about maybe trying to collect that in the first place, before we worry about preservation. A vast amount of essential knowledge is locked away in oral traditions, expensive textbooks, and proprietary company processes. This is why I hate the meme that the the internet gives you access to "all of human knowledge" - it would be unimaginably, profoundly world-changing if it really did.

"Most of our physical tech stack is read-only executable code: there isn't a civilizational "source code" that shows from first principles how to build up to our current technology layer. For that matter, not even from first principles to turn of the 20th century technology level." --yourapostasy [HN user] https://news.ycombinator.com/item?id=12824828