[swampangel]

> Maybe for some internal usages. but imagine someone from a country using different language and characters gives me a card with their email. It's now far less portable for me to use it. Those days, I surely could picture it and find the email most likely getting it right.

It would be more portable for use with their peers who speak the same language, rather than requiring that everyone they want to communicate with in their own language and alphabet understands a second alphabet just for the addressing scheme.