Or the other commercial/pro page layout apps (Pagemaker, etc) that were already in use before MS acquired Word (I was using Word called by another name before MS acquired it.)
Then there’s the page layout systems used by print orgs back in the 80’s.
Having worked in/with numerous very large organizations (think 10,000 employees+), I’ve never seen this “repository of templates”. There were some templates, for maybe corporate stuff, and a handful here-and-there for maybe business-unit-level stuff, and they were as grammatically flawed as any other documents (which drives me bonkers).
What Word standardized was people’s misunderstanding of page layout (which word doesn’t do), thinking this was the same as document generation.