At least in case of mailbox, I would say they were sherlocked by Google Inbox: nearly as good an UI but without the need to share access to email with a third party.<p>I really never liked that aspect of mailbox and I thus never used it with my primary mailbox, which meant that I practically haven&#x27;t used it at all.<p>The moment Inbox came out for google apps, I started using it to the point where it is now my primary means for accessing my mail.