Just as some people suffer from 'mic fight', some suffer from 'keyboard fright'. Macros are a way of coping with that, for some. They are also a blessing for the people who can't type or can't spell, and that's still a fair portion of the population. I suspect the younger ones were 'texting' on cellphones ling before they got on the air, and they are accustomed to 'conversations' that amount to 1-3 lines between the two parties.
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