Everything Google does is in Beta
Google's problem is they haven't grown out of the quirky young startup phase trying to find their place in the world. Start-ups do one thing, they develop an idea most of the way until they can produce it, then hope it gets picked up by either consumers or VCs to the point of establishing a "real" company.
Google doesn't need VC money anymore, but they don't have a concept of good and bad ideas. They just have ideas, so they throw them out into the world and see if anything catches on. Then they TINKER endlessly until the resulting product is no longer recognizable, resign to the fact that the public just doesn't like what the product is anymore, and cancel it.
Google is an advertising company, they just can't admit that to themselves.