> they know the risks of being dependent on Google

I wouldn't argue it's that risky. Look at their past entanglements:

1. Google Default Search Bribe - brings in $20B a year for literally doing nothing

2. Google Maps: Google let them build their own custom app using Google's backend, and it worked fine all the way up until Apple chose to exit that arrangement

actually I can't think of any others, but is there an example of Apple getting burned by Google?

Android.