Cat Valente remarks on the old-fashionedness on display in Star Trek DS9, particularly in regard to what the characters do and don’t do with their free time, infinite bandwidth, extreme connectedness, and lack of scarcity.
Nobody sits around and plays Farmville. Nobody gets embroiled in a flame war concerning the portrayal of Klingons in human vids or just sits and watches vids with their feet up. Nope. The brave men and women of the future read (super old) books, talk to each other face to face, and even in their VR fantasies practice for things they will have to do in real life or, admittedly quite realistically, have space holosex. There is no WoW. There are no video games at all unless they are evil ones from Risa that will suck out your brains.
Because of this, and because of the lack of a social network, it is possible to be alone in the Star Trek world in a way which I would have to deliberately take action to achieve in my world. Even when we are alone, most of us check a number of communication vectors and leave them live—Twitter, email, text messages, Facebook, our blogs, Reddit, news feeds. We are a baby hivemind spinning our training wheels. To be alone as profoundly (to me) as Sisko, Kira, and the rest often are, I would have to make a decision to shut down all of those streams.