Googles responds to privacy concerns. I do not intentionally use anything Google, primarily because its the 800 lb gorilla, as they say; and I prefer to patronize the "under dog".
I don't understand why folks use web mail when these days one can set up Mozilla Thunderbird, for instance (I'm sure there are other free email clients with the same capability), to download Gmail and other free web based email services to their computers.
I started with Netscape and for many years now have used Thunderbird as my email client, thus my address book is on my hard drive not on a Google, Yahoo, or etc. server somewhere. I add only those contacts to Yahoo Messenger I wish to.
Likewise, I will not be "cloud" computing, as I don't wish to store my files, photos, and etc. on some server somewhere in the world. I just don't see the point. One, it seems, will still want a backup copy of files, photos, and etc. So why not store things on a couple hard drives? I just don't get it.
I do not "social network" for similar reasons. I am not that chatty and I value my privacy.