This study is from GitBook, so read with that lens firmly in place.
One of my "evangelist" goals in this life is to link up the so-called "docs-as-code" approach with legacy industry documentation, by using high-function lightweight markup in place of more stodgy SGML/FOSI/XML/XSL tooling[1] but aligned with the legacy business processes (instead of the business process of pushing bits).
[1] With their six-or-seven-digit tooling Ivory Towers no one else can look inside of. The fact that lots of old school doc people see the "untouchability" of a pubs system as positive . . that's a values difference, and probably the highest wall to jump.