Comment by exceptione

  > RCS isn't an open platform in practice. It isn't even as open as SMS/MMS. It heavily depends on proprietary Google and carrier infrastructure in practice. We can start by replicating Google's approach and then we can work on only using carrier services for carriers where it's actually supported.

What is the point of RCS though? It seems to be strictly inferior to Signal. It seems a Google product meant to serve Google. I wouldn't hate it if GrapheneOS would totally ignore RCS. I fail to see any value in it, but maybe I am lacking information(?)