Apple wants to get ahead of the game and they want their users to contribute to improve their map. However as a user we should get something in return for doing this favor to Apple. But what they did to us they pretty killed this feature on iPhone 4. Imagine a number of combined users including iPhone 4 and 3GS, that would have been a big help to improve their mapping service. Typical Apple bs giving a reason yet they neglected their other customers.
Were people complaining when they helped google and their map app that didn't even have turn-by-turn?
iphone 4 and 3GS can still use other mapping apps (MapQuest, Garmin, Tom-Tom, Navigon, Waze) to get turn-by-turn, or use the web and continue to use google maps without turn-by-turn, which is all they had anyway.
I love the new Map app, it renders faster and is more intuitive, and minus a few 3d glitches is much nicer looking. I haven't had any issues personally, but if I do I will send updates just like I did with Google early on. I will use it this weekend for a 8 hour drive to Ohio and see how it does.
I am glad they did it, may hurt for a bit, but if I were Apple, I wouldn't want Google to continue to better their own apps using my customers and wanting to have more access to everything my customers, all the while trying to compete with me.