Customers/users/developers don't care what the reasons are, only that it continues to happen. What is especially irksome to many is that they are shutting down products/services that found an audience... just not one large enough, fast enough to Google's taste. The more they shut down products, the longer many are going to wait before even considering using one of their new products/services especially if there's a cost associated with it. It becomes a self-reinforcing cycle: Google launches a new product, customers/users/developers wait to see if Google is really serious about it, Google shuts down product because it never attracts the critical mass it needs to see, customers/users/developers get even more jaded toward the next one... rinse and repeat.