Agree.It also has one very useful feature that spoken/live communication doesn't: the Backspace key.
This works well as long as the email doesn't have a tight deadline by which it must be sent, but, yes, in general, I'm in agreement with you.Can't count the number of times I spoke before thinking things thru, and wish I hadn't said that. Emails give me a chance to step back and make sure I hadn't said anything I'll wish I hadn't.
Excellent advice, to recommend sleeping on something - and re-reading it closely, the following morning, and revising and editing as necessary - before proceeding to press "send".And I've learned that if its an email about something I'm angry about, to send it the next day, after sleeping on it.
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For what it is worth, when not tied to time by an immediate deadline, this is exactly what I do.