When I say “thank-you” to my teens’ friends, they respond “no problem”. I usually respond “do you mean you’re welcome”?...to which they respond, “yes you’re welcome”. I’m now getting the same “no problem” response from some adults!
You have to vigilant or these phrases will find their way into your own speech, without your even realizing it. I became aware that I had been responding to a “thank you” with “no problem” after reading one of these threads. Maybe it’s futile to fight against changes in usage in the English language - there’s nothing inherently magic about the phrase “you’re welcome”.
Or, when teens say, “My mom gots a new car.” AAAAGGGGGGHHHHHH!!!