This is my first time actually trying to use it thoroughly with anyone, but RCS is an extremely poor experience through the day and night with my wife and I. We are both on AT&T, both on Pixel 7's, and it keeps saying she is offline, then it says tell her I'm offline. All the while our phones both say connected.
If this is typical of the RCS messaging experience, then I want no part of it.
Edit: for the record this is my impression of RCS but I rarely "text" the folks in my social circles anyhow, with messaging apps being a thing.