Facebook and Twitter represent v1 of social networking, a bad copy of the analog world, whereas v2 is something unique to digital and a lot more promising (Ben Thompson/Stratechery)

Ben Thompson / Stratechery:
Facebook and Twitter represent v1 of social networking, a bad copy of the analog world, whereas v2 is something unique to digital and a lot more promising  —  It's a rather motley crew.  One is a nurse, another a lawyer, a third an investment adviser.  There are three programmers, a soldier, and a data scientist.