> But something crucial is missing from modern PKM apps: they do a poor job of helping me re-engage with information that I’ve already captured but forgotten about.

> If I’m not careful, my PKM apps become black holes where information goes to die.

Well, that's because just writing notes != learning. Obviously the information get forgotten.

I can't believe the author were so obsessed with PKM, but there zero mention of spaced repetition to help them learn and remember information. (Anki, Supermemo, or at least some Obsidian plugin with same function)