I don't get the RCS hype. I already have apps for rich messaging and RCS offers nothing for me over those apps. What I do appreciate is SMS, which is posed to be killed-off by RCS. I can rely on SMS even when there is no data signal, can't say that for RCS. I wish I had a way to permanently disable RCS on my Pixel 6a, instead I have to keep rejecting the 'upgrade to RCS' dialog.
My husband and I were having an issue yesterday sending an RCS message, they were never getting delivered. They ended up being sent via SMS. It cleared up after an hour or so