In reply to Crystal T..

Yes, I'm still at it several years on. If it's changed much, it's really just gotten simpler. The only complicating factor was buying a filing cabinet (or four) to store it and the rest of my index card collection in: https://boffosocko.com/research/zettelkasten-commonplace-books-and-note-taking-collection/#Boxes (You really only need a small, cheap box, but I love the vintage look and feel of the originals which I collect as a hobby.)

I've also added a few typewriters to my practice to type cards up with as well. Makes things more fun.

Any "spread" in a bujo can be an index card: future card, monthly card, daily card, to do card, lists, projects, etc., etc. It's smaller, easier to carry. I can archive old cards and don't need to worry about losing everything all at once if my notebook goes missing.

If you need some additional social "proof", take a look at the idea of the Memindex, which was used for over half a century by hundreds of thousands of people before the Bullet Journal was a glimmer in Ryder's eye: https://boffosocko.com/2023/03/09/the-memindex-method-an-early-precursor-of-the-memex-hipster-pda-43-folders-gtd-basb-and-bullet-journal-systems/