The more people they keep from using this garbage "standard", the better.
It still requires a phone number. It still falls back to SMS, it still fails, a LOT - just see the comments in this thread.
It's 20 years too late.
XMPP was better, in 2010, than RCS is today. I was using XMPP on my phone in 2010, messaging people on computers, seamlessly. Without a phone number. On multiple services using Pidgin.