I think more than just a product decision, this seems to be a more strategic decision. Inbox is great for consumers, for your personal email. But for power email users, there's very little, which is perhaps why they haven't even opened it up to Google Apps users.

There's an underlying trend, while consumer mobile apps have been embracing more and more unbundling, the good business mobile apps out there are actually bundling more and more. Inbox replaced Mailbox for my personal email.

But for work, once I moved to Acompli https://itunes.apple.com/us/app/acompli-email/id829384901?mt..., there was no turning back.

Acompli leaves a lot to be desired in terms of design, but I really don't care because it has seamless multi platform file integration and integrated scheduling features, stuff that I don't need for my personal email. But mailbox and now inbox is great for my personal email, because it focuses on stuff I really care about: quick replies, adding simple tasks and most importantly snoozing emails that I don't need to reply to rightaway.