This Pandora box is already open. Any argument about guardrails now are only attempts to create an artificial monopoly or keep this power in the hand of a single nation state, and _that_ is the absolute worst, most authoritarian future possible.
In order to start securing and accepting our new reality we need to assume that capable, open-weight, unrestricted models will be widely available, and that their 3-6 month lag behind frontier proprietary models is just our forewarning of what attackers will soon be capable of. Trying to legislate against or control trade in such a valuable commodity is folly.
I also think that lag is going to shrink over time as the open-weight labs get more capable, acquire more hardware and the plateau starts to emerge.
Not according to Anthropic https://www.anthropic.com/news/disrupting-AI-espionage
The "best" thing the US government can do is to build a Great Firewall to wall off the "existential threat from China". I'm not an American so if you guys decide to do it, good luck.