I don't think this is a foregone conclusion by any means. Many countries have gotten growth rates low enough that even after 2 years, their whole population won

I don't think this is a foregone conclusion by any means. Many countries have gotten growth rates low enough that even after 2 years, their whole population won't have gotten it. Some countries might opt to infect everyone (as the US seems to be doing, due largely to chaos and incompetence), but I don't think it's the only option.