I've worked remote for a year and my experience is the exact opposite. I generally know my coworkers well enough that I feel comfortable when I've actually been around them. We use Slack, we have daily "standups" for scrum, etc.. Almost everyone has some clue what other people are working on. Everyone works in NA, so there aren't serious timezone issues.

My experience has so far been that I never want to step foot into a real office again if I can avoid it.