"Give up all of these cool features because it's 'open'" isn't a winning argument with any consumer. WYSIWIG rich-text documents are table stakes. Users have

"Give up all of these cool features because it's 'open'" isn't a winning argument with any consumer. WYSIWIG rich-text documents are table stakes. Users have had them for 30 years, love them, and are never giving them up. Their layout (and thus their schema) are also incredibly complex by necessity.