It's hard to say the nuclear arms race is stopped when the US actively bombed a countries nuclear processing plants recently, and the US is also talking about building the Golden dome.
If the incentive is there, the technology will advance. I hear "we need to slow down the progress of technology", but that's misunderstanding _why_ it progresses. I'm assuming the slow down camp really need to look into what's the incentive to slow down.
Personally I don't think it's possible at this stage. The cat's out of the bag (this new class of tools are working) the economic incentive is way too strong.