It's not complicated. It's that there is no other option that gives more benefit (to the average user) than having all your contacts in one system. It's not goi

It's not complicated. It's that there is no other option that gives more benefit (to the average user) than having all your contacts in one system. It's not going down until the privacy issue becomes enough to make average users quit, something with greater benefit appears, or something gets users to switch services en masse overnight.