I use Obsidian a lot, but very few extra features or plugins. My first impression is that I don’t get what you’re making from the website. Any tool worth using in this space (which I vaguely understand to be using large collections of Markdown and/or realtime multiediting) is fast. Obsidian is fast. Zed is fast. It’s table stakes for the kind of person who would use this already.

Is it just Zed + Obsidian? A good knowledge base that scales well and uses plain markdown, but has the fancy multi edit stuff?

Thanks, I mentioned "fast" to differentiate it from Notion, which becomes super slow as you add more and more pages.

Obsidian and Zed are desktop apps, whereas Hyperclast is web-based. Obsidian isn't multi-player, and not really meant for teams.