This speaks to how useful email is as a communications medium on the Internet and it's likely one reason why, despite all the new modes of communication, it's s

This speaks to how useful email is as a communications medium on the Internet and it's likely one reason why, despite all the new modes of communication, it's still a widely used standard: people from different cultures all around the world can get back to you at their own pace and there's generally no expectation of an immediate response.