No, I'd rather we have an actually open, federated standard such as XMPP or Matrix, with a trusted directory service binding phone numbers (that one could be operated by phone networks) and email addresses or DNS domains to IM handles.

And if we can't figure that out, I consider Google and Meta equally bad gatekeepers of global B2C and P2P communication, and don't see why I should use the technically strictly inferior solution of the two.