Right, it has a function but it's not going to be the go to social media for the intimate or personal settings because it's public. This limits it's potential to grow.

A site where people will be accountable for what they say.

In other words, on the record official business. This is limited though precisely for that reason because how much of communication between people is designated for maximum accountability?

Great for interviews. Great for business. Great for journalism. Great for politicians. But the majority of millennial communications I highly doubt will be in these categories.