I agree, but to nitpick one thing: RCS isn't properly decentralized. It's controlled by carriers in the GSMA and, with the current way the infrastructure has be

I agree, but to nitpick one thing: RCS isn't properly decentralized. It's controlled by carriers in the GSMA and, with the current way the infrastructure has been deployed, Google. Interoperable on the app level, yes, but not a poster child for decentralization.