If you never define something concretely, no one can say whether the thing exists or not. "Google+" was never any specific service or technology or product, so

If you never define something concretely, no one can say whether the thing exists or not. "Google+" was never any specific service or technology or product, so the term is just a label that Google management can apply to whatever they want. Google Reader was alive. It's now dead. Google+? Impossible to say.