Both have issues. iMessage has problems with interoperability, RCS has problems with requirement of operator support.
Re:Beeper – Moving Forward
by jacksontrom on Friday December 22, 2023 @04:11AM
(#38732404)
Google is still working on the standard and adding features to it. If their previous statement is true, they will open source it after that.
But you know what I mean - E2EE of Google Messages is closed solution.