I have noticed in recent years that "of course" has replaced "you're welcome." This has been true of servers in restaurants for a while. The other fay Bob told me that a man held the door for him and when Bob said "than you," the guy responded "of course." I googled it, and some of the links attributed it to millennials, while others said it was gen z. The sentiment ranged from claiming it's a less formal way of saying you're welcome, the action was expected and insignificant, to suggesting it's rude and implies entitlement. Discussion of an alternative, "no problem," surfaced in a few links. I started thinking about "of nothing," the translation for de nada. Language is interesting, nuanced and it evolves.