Almost all the single people I know my age live with roommates. In part because it's cheaper, but also, I think, because it's less lonely. I'm something of an introvert, so the 2–4 roommates of a typical house or apartment is my ideal. I can imagine an extrovert wanting to live in a space like that. But I probably wouldn't want to visit.
As you know, I have a family so my home life doesn't lack for human interaction. However, I work from home too and I am often downstairs in the home office by myself. I do miss the interaction that comes from being in an office. Having co-workers in a close proximity to bounce ideas off of or to commiserate with is nice. I wonder if introverts tend to have less children? If so, are they being bread out of society? If I lived alone, I'd definitely not enjoy it. This is actually right up my alley.