Gmail smart replies may be creepy, but they're catching on like wildfire

This summer, Gmail's billion-plus users received a new chill-but-efficient way to answer emails: Smart Reply.
Smart Reply is Gmail's suggested response feature. At the bottom of received emails, Gmail serves three short phrases that its AI has determined are appropriate and relevant responses. Popular responses are phrases like "Awesome," or "Sounds good, let me know." 
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The feature was initially available just in t