You know global trade would still exist, a lot of treats would be much more expensive though.
People have an unrealstic expectation of what that would imply. Although most of the typical suburban american lifestyle would be gone and no more labubu dubai chocolate macha crumble cookies.
No americans need deep-fried double bacon tripple cheese whoppers each day, And they all need to live in Phoenix, Arizona and have a big beautiful lawn and run the AC 24/7