Yes and no. If its mission really was to overtake Facebook or Twitter, yes it is a failure. If its mission was a new type of social network, absolutely not. I

Yes and no. If its mission really was to overtake Facebook or Twitter, yes it is a failure. If its mission was a new type of social network, absolutely not. I and many others use it daily. Third parties won't know, though, because literally every one of our posts are private to just our circle. (Only Google knows that we are actively using it multiple times a day in this circle)