That's the thing that's hard: Facebook is _brilliant_ at
  grabbing, holding, and continuing our attentions. It's hard to
  get bored here once you join a few groups. Constant movement and
  activity, feed items being shuffled all of the time. It's
  brilliant, which makes it devastating for competition. You have
  more niche-interest sites. tumbr, 4chan are very specific.
  Google-plus always has promise (I've been a frequenter since it
  was Google Circles) but they've made recent drastic changes that
  I haven't bothered to adopt much of yet. Lots of dead social
  networks abound. Yet, many are alive and active. Myspace is
  still around and in constant use by some people... bebo recently
  reemerged from the grave... and there's always a myriad of
  forums on the 'net. But facebook brings it together in the way
  that email and Usenet used to do, and AOL inbetween them. So,
  yeah - it's tough to break free of the blue and white. == I
  frequent Vine. I'm hooked on it. It's a smartphone only service
  - and like many others, very specific. It's for short 6 second
  videos. I use it like a social network, even though that's never
  been its intent. Many things that people use nowadays instead of
  FB are all "for ppl already friends". Kik, Snapchat, Whatsapp -
  all strong payers in their own ways. Then you have gaming.
  People who you don't know exist are doing their social
  networking on Steam. Or on their XBox or WiiU or Playstations.
  When I was doing a Minecraft server, most of the ppl on it never
  had ANY social network acct: the virtual worlds that created and
  joined in Minecraft were *it* - and likely still are for many
  still. So, I dunno. FB is general enough that it feels like a
  "homepage to the Internet". Google's "searching for websites"
  thing almost feels old now and common and a utility. I'm
  definitely curious what's coming on the horizon though. I try to
  keep my eyes open for it. == I had to give up on most privacy in
  2002 when Google acquired Usenet newsgroups. I had stuff I wrote
  on there from the very early 1990s that were suddenly very pubic
  and I was like, OH NO NO NO NO NOOOO.... and got about 5 'uh-oh'
  posts zapped. After that, I took a deep breath and dove into my
  no-privacy future. So, I've had a lot of practice in the 'yes
  you're public now that you're on the Internet" tongue emoticon
  ==