Innovation
Apple was not free to innovate with Google's maps. Yes, they have a long slog to catch up with the decade Google has been working on maps, at least in terms of accuracy (Google used to have a lot of incorrect data, too). However, accuracy will improve rapidly, and in the meantime Apple is now free to create any feature they can dream up. It is too important a part of the mobile experience to not have control over.
Why in the world did Apple ditch Google Maps? Was it a case of "Not Invented Here Syndrome?"
Apple was not free to innovate with Google's maps. Yes, they have a long slog to catch up with the decade Google has been working on maps, at least in terms of accuracy (Google used to have a lot of incorrect data, too). However, accuracy will improve rapidly, and in the meantime Apple is now free to create any feature they can dream up. It is too important a part of the mobile experience to not have control over.