[EADGBE]

The generations of people who used email and phone primarily are simply getting older, I think. It kinda forces the hand of this alternative.

Of the soccer team, basketball, and parenting groups I'm in; more and more of my peers probably couldn't even define a "calling tree". To them, there's no "alternative" to group coordination other than social media.

It's just easier to reach out on [X Technology] because they already friend-ed each other the first day of meeting. And FB makes that easy with location-based friend recommendations. Who even knows phone numbers anymore? (Emails next...)