I would think for the right price there are a variety of solutions available. And why wouldn't Bing or Mapquest be an alternative? (serious question)
Same reason that Apple is leaving Google.
1) The data acquired in mapping applications remains the sole property of the map maker. So all that user data submitted by iOS users over the past 5 years is one of the reason Googles maps are so good.
2) It would be ceding control of a core piece of technology to a major rival in the case of Microsoft and as has happened with Google, Microsoft could decide to start charging for access to their map data, or negotiate onerous terms.
3) I dont believe Microsoft or Mapquest offer turn-by-turn directions, 3D views, vector or OpenGL maps, etc
thats one of the reasons why the Lumia series uses Nokias mapping service.
Adobe and Microsoft aren't necessarily good parallels because those products are pretty dominant in their market segment. If Photoshop doesn't work as well as you wanted it to, well, if you're a graphics professional you suck it up because that's what you use. Apple, by comparison, has put out a product with some issues in a market segment where people can pretty easily move to a competing product.
You misunderstand my point, it wasnt Microsoft or Adobe products per se, those were simply the high profile casualties, rather it was the difficult decision to make a shift in strategy (Classic -> OSX and PPC -> Intel) that in the long run benefit users, but in the short term cause a great deal of frustration. Then as now, especially with the Classic to OS X switch people were livid; OS X 10.0 was a joke, it makes this Maps fiasco look like a walk in the park. And people did leave the platform, or didnt upgrade from OS9. Just like with Maps Apple could have waited another 6 months or a year for OS X and polished it a little more, but not enough, it needed to be in the hands of the public. That major shift in OS strategy is what allowed Apple to out-innovate Microsoft over the past decade and introduce iOS.
In this case a product that was working was replaced with a product that isn't working so well for a lot of people, it's not hard to understand why there's a lot of backlash. And saying that it's happened before or it's no different than Google has done it isn't going to matter to angry iPhone customer #36,214 who's lost in Cleveland.
Again youre misunderstanding my position. I completely understand and agree with the backlash - well the more rational backlash, some people are far too emotional. I know pointing out that major transitions are almost always painful, especially when forced wont make people any less angry. Im not trying to convince anyone that Maps is good, or they shouldnt be angry Im simply pointing out that the move away from Google was inevitable and the move was
always going to painful, whether Apple released Maps last year, next year or five years from now.