Lots of countries don't wash their commercially grown eggs (and have a much lower % from factory farms), which greatly improves shelf life in shops etc.

Yes. It was quite a culture shock to see eggs stacked up in the middle of the aisle in Mexican grocery stores. I also find that, in general, Mexican store-bought eggs taste better and have a much darker-yellow yolk.

Iirc, it’s only the US and Japan that acid wash their eggs, thus stripping the natural protective layer, and require refrigeration.