[OneDeuxTriSeiGo]

Tbh I have no idea. I kept up with it on the GrapheneOS discord and I think GOS put out bluesky/mastodon posts about it at one point.

> What's left in terms of meaningful technical barriers, that would prevent this all from being baked into Android instead of requiring Play Services?

Well now I think the last major barrier is cleared (which was E2EE being nonstandard). Currently the on-device infra is very google-oriented but there is support for non-google-jibe RCS but it still requires google, etc to explicitly opt-in apps to get access to the APIs on device.

A big part of this IMHO is google refusing to give up their moat but they may finally get it into AOSP at some point.

If they don't at this point I think the only way it'll happen is if the EU forces their hand (which they hopefully will do).