I reject that the only measure of success in this conflict is regime change, while that is absolutely the best desired outcome if said regime favors us, it is not a soul condition of success.
The removal of Iran’s ability to wage any kind of existential threat, proxy wars and power projection through terrorism are also effective metrics to label this operation as a success.
Those very desirable goals would be only transitory if a theocratic regime remains in place.
The declared justification for this second strike after the supposed total elimination of Iran's nuclear strike capacity is that the present theocratic regime was undertaking to rebuild its nuclear threat.
Are we to suppose that the same fanatical jihad will pass away into the ether simply because we spanked them again?
