Apparently, yes, developing nations are happy to do that: https://qz.com/705273/mongolia-is-changing-all-its-addresses-to-three-word-phrases/ https://qz.com/705

Apparently, yes, developing nations are happy to do that: https://qz.com/705273/mongolia-is-changing-all-its-addresses-to-three-word-phrases/ https://qz.com/705273/mongolia-is-changing-all-its-addresses... (Article from 2016 describing how all post addresses in Mongolia were switched to what3words addresses)