A more complete argument I opened yesterday. 

https://github.com/nostr-protocol/nips/issues/1207

> Nip04 use sucks, we will need to upgrade at some point. Do you think we should start asap?

Yes I have removed support for it in my noscrypt library but will be adding it back later for compatibility. Truns out AES doesnt actually seem to be the most portable. 

https://github.com/VnUgE/noscrypt/tree/develop