My impression was that Obsidian is more than an editor: personal wiki, todo tracker, database, etc..
The currently offered feature list in Ferrite — code blocks, mermaid — suggests you are targeting developers or tech people here, hence, not really iA Writer... Typora — never heard of it, can't comment.
Anyway, thanks for seeing this as skepticism, and not criticism. With my comment, I tried to subtly suggest that there should be more to it, than an editor.
Regardless, good luck!
You're right, currently Ferrite leans developer/tech with Mermaid, JSON/YAML tree viewer, and CLI integration. The Obsidian-style features (wikilinks, backlinks, knowledge graph) are coming in v0.3.0.
Target audience is probably "developers who take notes" rather than pure writers. The native performance angle is the differentiator, same niche as "I want Notion but faster" or "Obsidian but lighter."