>How can there be no RCS API? Eww.

Actually, there is an RCS API.

However, Google restricts its use to themselves and specific OEMS only. IIUC, that's currently only Samsung[0].

[0] https://www.xda-developers.com/google-messages-rcs-api-third...

Could LineageOS flip a switchand turn it into a free for all? That would be fun and interesting. Not that RCS is a remotely good messaging protocol.

>Could LineageOS flip a switchand turn it into a free for all? That would be fun and interesting. Not that RCS is a remotely good messaging protocol.

IIUC, the RCS API is not part of AOSP[0], and as such, not part of LineageOS. As such, I believe the answer is "no."

[0] https://source.android.com/