Frankly, Tim Cook should shut down the entire Apple Maps division. Who in their right mind is going to use Apple Maps at this point? Try searching "Pier 39 San Francisco". The query can't be any more specific, and it's the most iconic location for tourists, and Apple Maps will bring you to a pretty shady area of town, only a mile or two away from Hunter's Point, one of the more violent areas of SF.
Apple Maps is the native mapping framework. So for developers who don't want to wander very far, Apple will be their first choice. And Apple will be Apple's first choice for Apple apps.
I think developers will care more about better data than about the time it will take to import a framework into their X Code project. It's very simple to integrate either type of map.