Indeed. Using self-descriptive "handles" or usernames such as @name.surname or @company.city would be great for caller and texter identification, as well as use

Indeed. Using self-descriptive "handles" or usernames such as @name.surname or @company.city would be great for caller and texter identification, as well as user discovery--if they want it to be public, that is. That, and having to send a request before you can contact anyone would bring some control and protection back to the user.