With respect to knowledge and notes, I would say that the knowledge (gems) may not be worthless in an absolute sense but its relevance may no longer be worth the cost of keeping said knowledge organized under a given person’s organization scheme.

For what it is worth, I still find it frustrating when I cannot find a certain piece of information that I am looking for but I know exists because I came across it before but didn’t record it at the time. However, I also appreciate being able to forget distressing events that would find ways to remind me about their existence.

I guess all of this may depend on the exact definitions of knowledge, data, and memory, and how an individual reckons with acquiring, organizing, and forgetting information.