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There are a variety of pundit’s predictions on exactly what this departure will mean, ranging from “Google+ is dead” to viewing this as a more realistic application of resources by the company. Keep in mind, not only is Gundotra departing from the Google+ project, up to a thousand other employees are faced with their jobs being shuffled about. Much of this might simply be changes with organizational efficiency in mind - is Hangouts more effectively grouped with Android development, for example, since the majority of its use is by handset users. Personally I don’t think this will be an abandonment of Google+, although Google has shown a willingness to abandon products in the past, such as Google Reader. Google+ has millions of users which, while not as many as Facebook might enjoy, still constitutes a significant slice of the market. it also acts as a way to unify other services, such as Photos, Hangouts and, last but not least, YouTube.