Nobody I know uses Microsoft's lockin. Some prefer google's or apple's, but increasing numbers are trying to escape from being a data source for advertising and the NSA and ditching google, apple, and MS.
I agree that this is the next hurdle. To just from Microsoft's desktop embrace to Google's cloud embrace is to switch one master for another even though Google has shown itself to be an excellent open-source champion in terms of their Summer of Code effort and the amount of client (and server?) software they develop in the open. But lock-in is lock-in no matter how comfy the handcuffs.