I suspect that game developers and other creatives (like 3D artists and movie effects people) have ways they track their versions. They have quite unusual assets and workflows.

I agree that LLMs introduce a lot of new issues. We’re going to be developing a whole new paradigm, for working with them, and we’re just at the very start.

There are a lot of indie game devs and small studios that don't use any kind of formal system for this. Maybe they'll copy and paste the root folder once in a while. \Game - Copy (2) is technically version control, in a sense.