Chance of Iran launching a nuclear strike on the US has gone from 0% to 0%.

Chance of terrorist activity on US soil in the next 10 years has increased.

I don’t think it’s improved things for the US.

They could have nuked a neighboring country.

Neighboring countries like KSA have openly declared their intention to get nukes.

They could give the nuke to a proxy (or have it stolen) who then detonates it either at a US military base in the region or on US soil.