If it is RCS, it will be interoperable messaging, which is something the world needs. But I rely on Hangouts and the fact that I can have calls to my Google Voi

If it is RCS, it will be interoperable messaging, which is something the world needs. But I rely on Hangouts and the fact that I can have calls to my Google Voice number ring as a Hangouts voice call. I hope there is a reasonable migration path that does not force me to give up important capabilities.