Their source material here is 1 million pages of HTML, they don't have (on my reading) some separate source of "structured data" for the modern template system to use.

It seems reasonable (and possibly low) for a 90 days estimate to extract the content from the variety of versions of static page, structure it, and then publish it in a more modern fashion.

It's all very well to say they should have used a more efficient system from the start, but "the start" in this case is 1996, which is the wild west in terms of best practices.