They obviously will, it was reported already… and no reason not to, since there will still be two kinds of messages, they're just updating the fallback protocol to a better one than before
Green bubbles vs Bluebubbles, Apple adding RCS doesn't affect me at all, since I use neither Android or iPhone lol (so I mess up group chats for BOTH (But I don't because I just don't use the builtin texting))
Apparently this is an issue with kids because they're being class-shamed based on bubble color, which is not a sentence I ever expected to write in my life
If it's true I do think Apple should give parents a kid mode that makes all bubbles the same color to force their entitled little brats to find another way to feel superior to the poor kids