I've been at places where they were so vendor locked to a technology that there was a penalty clause for leaving that was in the tens of millions. It obviously wasn't cloud but the point still stands. If you don't have options you pay what they tell you or go out of business.
Yeah, I can't help but wonder about offerings like AppSync; in one level it seems cool, but I recoil a the thought of introducing a critical dependency on AWS for a core piece of the application layer.
