> nobody will be willing to upload the new knowledge to the internet

I think there will be differences based on how centralized the repository of knowledge is. Even if textbooks and wikis largely die out, I imagine individuals such as myself will continue to keep brief topic specific "cookbook" style collections for purely personal benefit. There's no reason to be averse to publishing such things to github or the like and LLMs are fantastic at indexing and integrating disparate data sources.

Historically sorting through 10k different personal diaries for relevant entries would have been prohibitive but it seems to me that is no longer the case.