Iโ€™ve been asked this question a lot: How does a PKM system help me?

Five days from today, a conversation may remind me of something I read/did today, which is useful in that context. I look it up in my exocortex.

Five months from today, I come across an article that seems to trigger a thought related or opposed to that. What do I do, I search for it in my exocortex and update that note.

Five years from now, maybe I am writing something and I want to use a quote or snippet. I run a search for related stuff (or it is augmented to offer a suggestion) and I get an apt quote/snippet right away.

Thatโ€™s what PKM means to me. The ability to get in touch with your past selves and also possible future selves is what makes it interesting to me.