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Nobody says it anymore
(startrek.website)
I've heard it explained that "hey" used to be more of an urgent way to get someone's attention, rather than a casual "hello" like it is now, so it sounded rude to some older folks.
Not once did someone say that to me in a corrective or condescending way. It was always a playful joke.
In elementary school we used to say "hay is for horses, and cows like you!".
We had "Hay is for horses, sometimes for cows, pigs don't eat it 'cause they don't know hows"
It was always "and cows say moo" for me.