Ask HN: Is frontal lisp "s" the new cool?

I was watching Youtube and couldn't help but notice the narrators would use frontal lisp to pronounce "s," in two completely unrelated videos.

1. https://youtu.be/0aSBk5bKG3U

2. https://youtu.be/zV9v0RIE-iI

Is this the new cool that I'm not aware of? Or some kind of social programming?