So of course I took it as a challenge

As one commenter in that thread said, Pacific Steam used to make the go-to high-end iron for professionals, but they've since moved their production to China (and conveniently kept the high price tag so they can rake in higher margins). They were a company 10 years ago I would have vociferously advocated for—a $200 iron that lasts forever is better than ten $30 irons that break once a year. But now that they've sold out to China they can no longer be trusted not to break down as this Amazon reviewer noted. Sad.
Here are the best options I found. Sadly there appear to be zero actual irons produced in the USA anymore, but at least I found some not made in China alternates.
1) Go to eBay and buy an old made in USA iron
Like most of your moms and grandmas, my mom had a GE iron that was a workhorse. It never stopped working. The next time you're in the market for an iron, think about getting a used made in USA on on eBay as opposed to a "new" one made in China that'll last for a year before breaking [Reminder: if you click through a link that starts with amzn.to or ebay.us I may get a few cents as an affiliate of these companies].
2) The last holdout for a "not made in China" iron was Rowenta, but sadly I see that many of their models are now made in China. These models seem to be the exception; based on reviews they seem to be made either in France or Germany. It's not the USA, but it's also not China. Grab them while you still can.
Rowenta Pro Master Stainless Steel Soleplate Steam Iron for Clothes - 1700 watts (DW8080)
Rowenta Everlast Stainless Steel Soleplate Steam Iron for Clothes - 1750 watts (DW 7180)
Rowenta Steam Force Stainless Steel Soleplate Steam Iron for Clothes -1800 watts (DW9280)
Rowenta Steam Force Pro Steam Iron for Clothes - 1850 watts (DW9580)
Steam Force Pro Stainless Steel Soleplate Steam Iron for Clothes - 1850 watts (DW9540)
Rowenta Steam Force Stainless Steel Soleplate Steam Iron for Clothes - 1800 Watts (DW9440)
3) Reliable's consumer irons are made in China, but they have some professional ironing stations still made in Italy
3000IS Professional Steam Iron Station - 1800W
Reliable 5100IS/2100IR Professional Iron Station - 1800W
4) While not an iron, a good made in USA alternative would be a Jiffy Steamer, made in the USA since 1940. Steamers are actually better than irons for clothes because they don't damage the clothes fibers.
Jiffy Steamer J-2000 Jiffy Garment Steamer