It created a brand-new concept of private listening, I think. Music listening must have been a communal thing up until then mostly (I'm counting record players in this, so we'd need to go further back before the 20th century to consider what I'm saying). It does follow that the more we allow you to do by yourself, the more you won't do with others. Take eating by yourself for example. I can't imagine that being a common thing before our time. Tech is really putting us into a spaceship. Your little dwelling is just a ship with a terminal, and you can definitely slap on some headphones and put a screen in front of you and basically float through space in your spaceship until the day you die.

We can probably measure the impact this is having culturally specifically in non-western cultures, because their baseline is not as anti-social compared to the west.

I think it's also worth noting that many are not going to read this article and go "hah, they got it totally wrong". They didn't. Mass scale human behavioral change has the been the story for a while now.