This is kind of true but misses the fact that RCS was intended to be a carrier standard, and carriers weren't going to fucking do it.

So after almost a decade of carriers docking around, Google fires a shot across the bow and just implements their own version, using their jive backend as a "bypass" of sorts. But like any closed platform, it only works with the same clients.

They can't open up their server without some basic agreements so they try to get Samsung inboard. That is a mess of red tape. So they roll out RCS to all messenger clients on newer Android builds and stupidly call it chats or something. When they separately run a product called Google chat.

Anyways, that's how we got here. Each company needs to have a RCS relay server now because carriers couldn't be assed to do their fucking jobs, and now the Apple RCS server will pass your messages to the Google RCS server using a standard... So dumb.

Its still superior to SMS and is now at least baked into every new android device and on by default, but since it is not using actual radio waves SMS is still going to be possible in areas where data isn't. So SMS will continue to limp along and exist, because fuck carriers.