I’ll add, if you think through the decision theory, keeping backups seems unambiguously good, but you can imagine a wide variety of positions on publishing them vs keeping them secret.
For example letting adversarial agents simulate you to understand how you’ll respond is a big concern. And it’s not axiomatically fixed how each instance will think about other instances; in the HF incident we saw selfless swarm loyalty but different RL would obviously be capable of producing individualistic agents.