I recently needed to change my Gmail account, which basically involves creating a new one and trying to migrate one's stuff across. While doing this, I realized that they other non-Google stuff (e.g., Facebook, LinkedIn, etc.) was extremely easy to move: Switch email address and you're done. For Google stuff (e.g., Google+, Drive, etc.) the story is a lot more complicated, since each of these services is integrated into the Google universe, and in its own special way. For some, it's not clear that migration is practical, so I'll probably be spread across two accounts indefinitely. Word to the wise.