Short answer
In Calenco, writers do not spend their time formatting the document. Content is structured first, then a stylesheet automatically applies brand rules when the publication is generated.
The stylesheet manages typography, colors, headings, table of contents, indexes, notes, appendices, and layout rules. The same content can therefore produce consistent outputs in several formats.
This separation of content and presentation removes much of the time lost in Word or InDesign, reduces presentation errors, and makes translated versions easier to publish.