So those of us who happen to own iPhones, and have friend who have Android devices, and would like to have (e.g.) group chats can go pound sand? Or try to get all of our friends/family to install yet another app? What is the main argument(s?) against implementing RCS? That it doesn't have E2EE? Neither does SMS, so RCS is no worse in that regard, but seems to have some extra nice things.
I keep being surprised how utterly selfish can brand fans be when it comes to their electronics toys. This doesn't affect pure Apple fanboys at all and yet they still want to mess it up.
RCS is crap and needs to die. Apple and Google should work together on a better standard.