Most have, but the decition is made by the local politicians instead of foreing nuclear powers. It's actually very similar to the impeachment.

Sorry I phrased that poorly. I meant countries have no means to impeach a foreign head of state so impeachment only serves as a power check if the citizenry disapproves.

Not that I think heads of state fearing for their lives from airstrikes is necessarily good, being able to act with impunity is certainly bad.