Great read, thank you.
I wrote a post more or less about this late 2011. I asked questions more about how people works, this one goes more into details and I like it. I think the 1, 4 and 10 on the list are killers but the most important one; its free, ant that is a single killer one. If free you have no reason or demand to be faithfull. Also the struggeling to always evolve...new functions, new IF... I get really tired of things you're not familiar with the next time you use it. But; I'm old.

Short breakout from my post 'Will the "Facebook era" end? (on inmaxmind.com):
"To me Facebook is a tool developed by young driven people and is used by primarily three types of users:
- Young people who see it like a natural way to socialize with friends, work etc.
- "Old" people who try to make money out of it. With this I mean companies and innovators who say Facebook is the future for business. I think they???re only struggling to make money out of it acting like "wiseguys". Sorry, but I do.
- "Old" people who is struggling to find a way to socialize, but they don't do it as natural as it is for the young ones.
Since the young people use it like a natural way they most likely will feel it's natural to use another tool to socialize. And when you lose the young ones what will then happen to Facebook?"
So, when will the Facebook era end? Because I think we have to add when to will.
It's controversial. But if we're not controversial no debate will exist.
@maxbuchler