The article is just elaborating on future GM vehicles, but yeah - that's pre-Commodore era... not much current/reliable info. Like the Camaro getting a "Beta" chassis
... and this article didn't say much about the flexibility of Zeta. It mentioned it - but that's what the big deal about Zeta is about - it's versatility.
Plus, Zeta has been cancelled, and re-instated sooo many times after that article.
I'm not sure we can rely on it.