The memex was a deterministic device to consult documents - the actual documents. The "LLM" is more like a dumb archivist that came with it ("Yes, see for example that document, it tells you that q=M·k...").
I grew up with physical encyclopedia, then moved on to Encarta, then Wikipedia dumps and folders full of PDFs. I still prefer curated information repository over chat interfaces or generated summaries. The main goal with the former is to have a knowledge map and keywords graph, so that you can locate any piece of information you may need from the actual source.