Ah yes let's adopt RCS, a standard that requires a phone number, isn't encrypted (yes I recognize that Google has a proprietary extension to the standard but that isn't part of the standard and is not standardised), and is controlled by carriers (A group known for supporting development of features that make them less relevant).<p>The blue vs. green is a very easy to understand demarcation for secure vs. insecure. Blue = secure, green = insecure.