Ask HN: Why doesn't Google open up an API for Inbox?

I quite like Google Inbox, I really like the way there's the ability to create tasks (reminders) and sleep emails for a period of time.

It's the reminders functionality I'm most interested in though. I don't have a nice solution currently for managing a TO-DO list which works everywhere. I'm currently experimenting with Taskwarrior [1], but what I'd really like would be to interact with the Google Inbox reminders API, if such a thing existed.

So - my question - Why would Google not open up an API for this? Support & maintenance issues? Not that invested and it'll be another Google Reader at some point? Shame, I'd love to build some integrations.

[1] https://taskwarrior.org/