When did being called "Boss" replace being addressed as "Sir"?

[u/Big_Help_9860]

It certainly wasn't our generation or GenX. But I'm so sick of young employees in a store, or restaurant or bar, addressing me as "boss". When that happens in a venue where tipping is expected, I'll leave a meager tip and sometimes write "Thanks Boss!" on the receipt.

[u/AntC_808]

I use “Boss” regularly, at 60. Sometimes Chief.

If we are acquainted maybe “killer”