Have to say, Message in iOS 10 beta 1 and 2 is pretty robust and steady for me. Not buggy at all.

It won’t be, not single one ResearchKit app was an stock app, you have to get it from AppStore. I don’t think CareKit can get any special treatment.

This is totally missing the point. And you didn’t understand marketing as well.

I guess its rude to quote 9to5Mac here, but here you go.