Comment by glenstein

It was a mystery at the time, but in retrospect it seems obvious that it was, at a minimum, a precursor to Slack and Teams. And could have been something else too, it was raw and open ended enough that new usage norms could have emerged and pushed it in any number of directions, setting the tone for any number of possible use cases. It could have been a social network, if the idiosyncrasies of community usage imprinted that on it.

As ever with Google ventures, especially during the DBE era, all they had to do was stick out and let it take on a life of its own. But I think what it takes for growing into an organic identity is more than the average time a developer works on a Google project.