I finally admitted to myself that a robust PKM can store and recall more information more easily than I ever could. It's quite a bit of work to process things I read or listen to into my PKM, but whenever I decide to revisit an idea, I can immediately pull up and review everything I've previously thought it would be useful to remember about it.

My PKM of choice (Logseq) does have a built-in SRS, though, so maybe I should consider having putting things I really, really, really want to remember into it so they're stored in my brain as well.