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Samsung joins Google in RCS shaming Apple
(www.theverge.com)
This is a most excellent place for technology news and articles.
It's not necessary to convince everyone to switch. Even one person switching from SMS to an internet-based chat app means a better chat experience with that person.
I've had multiple apps to be able to talk to everyone I know since about 1998, so I find the strong resistance you're describing bizarre. I have encountered it a few times though.