"In 1985, about half of Americans said they had a close friend at work; by 2004, this was true for only 30 percent" This decline precedes the Uberization of work (where people work more part time gigs with less coworkers around). It even precedes smart phones and being totally mired in watching our social media accounts when we get free time at work, as opposed to interacting with those around us. I can only speak fo…
I honestly think this keeps things more productive. There's less room for wasting time socializing, or worrying about people feeling left out, or (like you said) offending people, or anything else that takes time away from work. I've personally seen it happen where relationship concerns ("why won't they talk to me more?") get in the way of people's comfort working together. It's just silly to me. It has no place in the workplace in my mind.