[JimTheMan]

There's an amusing short story from Douglas Adams, who visited Australia back in the day where 'No worries' featured prominently.

https://douglasadams.com/dna/980707-08-a.html

"and get this, this is a very important and significant part of what happens to you on Hayman Island - staff who don't just say "No worries" when you thank them for topping up your champagne glass, they actually say "No worries at all". They truly and sincerely want you, specifically you, not just any old fat git lying around in a sun hat, but you personally, to feel that there is nothing in this best of all possible worlds that you have come to for you to concern yourself about in any way at all. Really. Really. We don't even despise you. Really. No worries at all."