> Some places have made total eradication possible (e.g. New Zealand)

Eradication seems possible when there's a small number of cases, and effective border control (being an island nation helps a lot). In the US it's going to be difficult to eradicate, because people can move about the country easily and the case load is high.

I haven't looked at other states, but Washington state has fairly clear metrics for opening restrictions at a county level. We'll see how well that works, I guess. Other states will be doing their own thing, as well as other countries, and maybe we can figure out which methods are more or less effective and either switch or know for next time.