Ask HN: How would you build second brain in the AI era?

Less structure? I think links are less necessary. It's a bit like using email when search is cheap, you don't need to rely on tags if you don't want to.

I have a fairly large set of notes written in Org, and I never bothered with internal links. Ripgrep search was always enough for me to make connections.

With local LLMs, it's even better. gptel makes it really easy to add notes as context.