reply to michaljjwilk at https://hypothes.is/a/rwiI4rJYEe62aaN50r2zzQ to ensure it's properly indexed:

Most following my argument will have likely read The Two Definitions of Zettelkasten which may cover some of your initial question, or at least from my perspective. (Others certainly have different views.)

Some of your questions relate to what Robert Hutchins calls "The Great Conversation" (1952) and efforts over time to create Summa or compilations of all knowledge.

Variations of your remark about Plato can be seen in later Greeks' aphorism that "Everywhere I go in my head, I meet Plato coming back." or more recently in A.N. Whitehead's statement that everything is "a footnote to Plato".

https://en.wikipedia.org/wiki/Summa