That's a great question. When I think about AI, I often try to separate the applications of AI and the current systems we have today. Many should be regulated the way most normal and new technologies are regulated.
The thing I focus most of my time on is thinking about where the technology is going, and what the risk will be from these very advanced systems. In that case, it is, unfortunately, a very challenging coordination problem.
As for any actors deciding that they think the risk is too great, their slowing down does not really help avert anyone else building a system that would pose those risks. The main area of focus should be on trying to have those conversations with partners to figure out an agreement they could come to in order to stop pushing the frontier.
However, I think that our best chance of not succumbing to a catastrophe is finding some way to agree with international partners on which frontiers we aren't going to push.