iPad and MacBook Pro. And my wife’s iPad occasionally.

Your second bullet is not true at all. I can discover my phone without being on the hotspot screen.

“I’m going to clear up something” - Proceeds to write a few run on sentences that are even more confusing than the original post.

I’m a software developer, I understand what open source is. You want Apple to open source their own operating system? What does that matter to you as a user?

If they allowed open source? What do you mean by this? My open source app runs fine on iOS.

The blue bubble will always be better though. iMessage includes games, business chat, apps, safety check in, etc. RCS doesn’t support any of that.