That might be more you who's changed. I've made friends via Hacker News, and I believe it's fairly common for heavy Twitter or Tumblr users to meet people that

That might be more you who's changed. I've made friends via Hacker News, and I believe it's fairly common for heavy Twitter or Tumblr users to meet people that way, too. This article[1] (long) discusses how the same phenomenon happened on Google Reader until its social features were removed a year ago. 1. http://www.buzzfeed.com/robf4/googles-lost-social-network http://www.buzzfeed.com/robf4/googles-lost-social-network