In the past several decades, there seems to have been a decline in the use of the phrase in casual conversation. It would be easy to blame millennials for this linguistic phenomenon. But etiquette experts believe that the reason for the shift isn't because of generational tendencies, lazy behavior, or even rudeness. The decline of saying "you're welcome" actually comes from something quite surprising: a desire to be more considerate.
"Maryanne Parker, founder of Manor of Manners and author of Posh Overnight: The 10 Pillars of Social Etiquette, tells CountryLiving.com. She explained that "you're welcome"—a phrase that is meant to be courteous—is sometimes perceived as insincere or snarky.
Comedians were among the first to capitalize on the sarcastic potential of 'you’re welcome' ," wrote The New York Times’ Amanda Hess. Following that ironic take on the expression, a cultural shift has made it common to say "you're welcome" for no reason at all—signaling that no thanks are necessary because you're already aware of how great you are.