It’s likely that this would slow down the rate of advancement at the Chinese labs as well

I don't see how, other than that it will make it harder for chinese labs to train their models on OpenAI/Anthropics' (which honestly I can't get that worked up about plagiarism in this space considering where they got their data from..)

Or significantly increase their market share outside the US and give them some breathing space to catch up with the currently available closed models