Earlier quoted context omitted.
Tbf imessage also allows people to message non iOS users but apparently the ‘color of the bubble’ has been a big thing in the U.S. among youth.
I think calling it just "color of the bubble" downplays the intentional degredation of chat quality for everyone in the chat in order to encourage exclusion, presumably to create FOMO. Incidentally FOMO is a very powerful among youth, but it's still a thing for any group in some capacity. Not that I personally cared, as i see it as an Apple flaw, but in joining a work iMessage group I had people whining about image q…
They will use the iMessage protocol if supported by all clients. If not, they fall back to the next best thing supported by all clients whether RCS or SMS/MMS. In your case (possibly before iPhones supported RCS) the "next best thing" was apparently SMS/MMS.
This is the correct behavior.
I think you're also falling into the common trap of automatically thinking whatever Android supports is like, the correct and open standard.
In reality, RCS's history was an absolute mess of incompatible implementations, pushed and owned by some of by Apple's direct competitors. It's really not any more the "correct" standard than iMessage is and it does not support E2EE outside of Google's proprietary implementation. https://en.wikipedia.org/wiki/Rich_Communication_Services#De...