Difficult to see, the future is.
Yahoo never became anything beyond an email, chat, and search platform.
Oh but they tried. They spectacularly failed trying to make their email chat and groups into something like facebook. It took a few weeks of flaming and holy hell rioting on their support pages before yahoo gave in and put it all back the way it was, and not before they lost 1/3 of their userbase.
The problem yahoo and google have is they've lost sight of their userbase. They don't do what brought them their users,or what keeps them there, they try to be what everyone else is instead of perfecting their niche, or being original, they just make poor imitations and screw their existing users but trying to shove them into things those users dont want.
That's the problem.