I think it would be next level to have an “expansion pack” for themes that include templates for the knowledge base. Something that didn’t have to be part of existing themes, just add-on for those with the theme, run off the theme settings, etc., but have the templates needed to customise the knowledge base beyond CSS. Since not all users need or use knowledge base, I don’t think it should be included in themes to avoid confusion (“I thought it was a page template I could use as a website page”) but very clear that it is for the knowledge base only.