Starting the war with Iraq in 2003 was definitely a pretty stupid decision, and at the time some pundits predicted that it was the beginning of the end for US hegemony. But now a couple decades later the US is still looking pretty hegemonic. US hegemony will end some day, but we should be skeptical of predictions about timing.

This war is like going to the dentist for a root canal. No one likes it, OTOH none of neighboring countries want a second "north Korea" as their neighbor. Time will tell.

This take is extremely arrogant. You can make the argument that shuffling the deck like this will lead to unexpected outcomes but claiming one way or the other to know the outcome is just silly.

If anyone feels sure they know what the next several years has in store regarding Iran they are just demonstrating their own ignorance. I’d expect more people here to be cognisant of the Dunning Kruger effect.

No it won't, that's merely fantasy projection (a personal desire for the US to suffer for what it's doing). US hegemony ended with the rise of China's economy into superpower status over the past 10-15 years. There was no scenario where the relatively brief US hegemony from the late 1980s to the late 2000s was going to continue no matter what the US did. China was always going to build a military to match its economic might. That military will gradually project globally.

US hegemony lasted for a mere ~20 years. Today it does not possess hegemony, China is able to stand-off fully with the US both economically and militarily (at least in Asia).

Iran is a regional conflict. It will matter less than the Iraq war and occupation did.