So you say it's inspired by Obsidian (and call it an "alternative") but notably missing from your table of syntax support are [[wikilinks]], which for many (I would guess most) users would prevent this from being a drop-in replacement, even for just viewing a vault. Is there a reason you chose not to support them?

Yes, internal links will be introduced in the next version along with other features like standard theming and more. Ekphos is currently in a rapid development stage and is slowly reaching core markdown feature parity with Obsidian. Feel free to open a discussion in the gitHub repo for things that would be nice to add to Ekphos :)