Being from Brazil, where table salt is universally iodized, I have a hard time understanding how in 2021 there are still rich countries out there that haven't figured out a proper iodine fortification program. And we even have some people saying they intentionally prefer non-iodized salt!
On the other hand, there was one time I had to do a short no-iodine diet and it was pain in the ass. I had had to go out of the way to find non-iodized salt and good luck finding any pre-packaged food without iodized salt...
In Poland we have normal iodized salt, but we have uniodized salt just for one purpose - making pickled cucumbers. But our "kiszone ogórki" is not the same as typical pickled cucumbers ("ogórki konserwowe", we have those too). It's more like sauerkraut but with cucumbers. With iodized salt they just spoil.
On the other hand, there was one time I had to do a short no-iodine diet and it was pain in the ass. I had had to go out of the way to find non-iodized salt and good luck finding any pre-packaged food without iodized salt...