2013 here, I think. Google remotelly force-installing Google Play Services on every live Android in the world at Q3 2012 made me do the jump.
Edit: Yeah, that’s the year I bought my now-death Nexus 4, first phone I completely freed from Google (ironic!)
Yeah, it has a lot of obstacles. You can read really useful info about this on this awesome article:
In fact, Google is beating us on some wars… because they are the powerful. Harming alternative syncronization or obstructing alternative location providers, for example.
I’m preparing a talk about livingwogoogle for a local audience and I’ve been compiling information this week.