I push for markdown in git whenever I can. You can autogenerate markdown, you can parse it, you can test it. You can version it, you can branch and merge it (and so include in "done" criteria), you can diff it. You can use your coding AI agent to search it (and update it). It's just files.

You can in principle do it all with other approaches, but it is much harder or clunkier. And with tools like Obsidian the end user experience eith Markdown can be absolutely as friendly and nice (or nicer) as with Confluence or Notion.