FWIW, CASE developers knew pretty early on that the separate artifacts diverging was a problem, or even the problem, and a lot of work was on trying to solve exactly that.

Approaches included having single source for any given semantics, and doing various kinds of syncing between the models.

Personally, I went to grad school intending to finally "solve" this, but got more interested in combining AI and HCI for non-software-engineering problems. :)