I never claimed to be precise, ha ha. But let's not lose sight that each of the great powers agreed to limits on the number of nukes only after making enough to collectively destroy each other several times over. They stopped exactly when building more did not gain them any more security or advantage over their adversaries. Not a moment before that.

There may or may not be such a point with AI: A point at which ever smarter machines provides no marginal benefit to security. If that happens, I do expect agreements, should any one of us still exist.