One upside of shut it all down is that it does in fact buy more time: in Plan A it is difficult to secure algorithmic secrets without extremely aggressive security measures, hence any rogue projects (e.g. nation state blacksites) can just coast off the algos developed by the verified projects. Then, a few years in, they fire up their cluster and try to do an intelligence explosion with the extra algorithmic progress.
One upside of shut it all down is that it does in fact buy more time: in Plan A it is difficult to secure algorithmic secrets without extremely aggressive security measures, hence any rogue projects (e.g. nation state blacksites) can just coast off the algos developed by the verified projects. Then, a few years in, they fire up their cluster and try to do an intelligence explosion with the extra algorithmic progress.