[thisislife2]

It doesn't matter - when a strong and stable political structures suddenly collapse, the state fails and disintegrates due to the political infighting. While I agree with you that the chances of Iran becoming a completely failed state is unlikely, I do see an imminent civil war in Iran's future if a regime collapse happens, and the Americans and Israelis install their Shahi (royal) puppet there. A regime collapse will of course mean Iran will lose its sovereignty (probably for a decade or more), till a truly independent stable polity emerges form the ashes.

[littlexsparkee]

I could see the water crisis, notably absent here, being what tips it. Iran is facing water bankruptcy and acquifers / groundwater recharge takes decades to centuries.

[enraged_camel]

Iranian regime is neither strong nor stable though. Or did you miss the recent round of nationwide protests that led to a desperate brutal crackdown?

[thisislife2]

That's just simplistic western propaganda. Sporadic protests, nationwide or otherwise, don't mean anything unless they are backed by long-term-opposition with strong grass-roots and singular political goals. Iran's regime remains strong and stable - it controls all the political institutions, it controls the civilian government at the local level, it controls the religious / cultural institutions, it controls the military and it has substantial support from the people. Why do you think Israel or the US isn't sending boots to the ground? Apart from the official military, the IRGC has a voluntary civil force, that can be armed by the Iranian military, in every district - if Israel or US send their soldiers to Iran, they will face a very brutal urban warfare with a high death toll.