Well, a million years is about 5 times the lifetime of our species. Whoever will be reinventing our knowledge will probably be so different from us that this discussion won't make any sense anymore.
A few thousand years ago, somebody probably asked "How will people of the future be able to tell histories once we paint over all the rocks?"
"Whoever will be reinventing our knowledge will probably be so different from us that this discussion won't make any sense anymore."
You're going to make contemporary archeologists cry, saying things like that. And the future ones are likely to be even better at it.
That might make an interesting very long term startup idea, in a million years it may make a heck of a lot more sense to hire archeologists to "discover" new areas for business profit than to hire primary creators to try and re-invent the hard way, the same way the first 345 times "it" was invented. And I'm only slightly tongue in cheek that this is already how contemporary IT works.
A few thousand years ago, somebody probably asked "How will people of the future be able to tell histories once we paint over all the rocks?"