Spot on.
iMessage took over because iPhone users could no longer send group SMS. Apple killed group SMS. Google never did this. Only tried to change Sms and enhance it.
iMessage took over because iPhone users could no longer send group SMS. Apple killed group SMS. Google never did this. Only tried to change Sms and enhance it.
If everyone has it turned off, it is just the normal group SMS experience (also terrible). SMS group chat isn't gone, you just very rarely see it because there is almost no reason for an Apple user to disable iMessage.
This is also no different to everyone in a group who can use WhatsApp or a similar app using that.
SMS is the lowest common denominator fallback. RCS is not much better.
One of the group chats my wife uses for work is all SMS users except for her.
Or am I misreading your comment?