This looks not too different than modern versions of the block-based blog editors in Wordpress or Ghost where you can alternate Markdown blocks with rich elemen

This looks not too different than modern versions of the block-based blog editors in Wordpress or Ghost where you can alternate Markdown blocks with rich elements. Ghost persists the data using the Mobiledoc format, which is JSON, not rendered HTML. This allows flexibility for display. https://madhatted.com/2015/7/31/announcing-content-kit-and-mobiledoc https://madhatted.com/2015/7/31/announcing-content-kit-and-m...