I've been using Logseq DB (this new version, as a nightly, for a year) and it's a really great concept, way better than anything I tried for notes and organisation. You can apply tags to blocks, which make them a kind of thing (a project, an author, a quote, a thought). It is very fast, and easy to learn.

I switched to it from Apple Notes + Obsidian (I've used logseq MD in the distant past). I have to say though that there are still some rough edges in the current developments and many concepts are still half-baked (Assets, Library).

I still use it because with it, I take more notes and retrieve them better, which is really convenient. The barrier to jotting something down is very low. I think the dev have really hit a sweet spot so I hope they can polish this application as it should be.