Is Apple "refusing" to support it or just waiting to see if Google will actually see it through? Google doesn't have a good track record for messaging apps so adopting their standards seems like a bad idea. If carriers get behind RCS and it actually becomes a thing then Apple will support it.
It isn't as robust as iMessage and won't ever replace iMessage so unless/until it becomes commonplace it doesn't add a lot of obvious value to most iPhone users.
It isn't as robust as iMessage and won't ever replace iMessage so unless/until it becomes commonplace it doesn't add a lot of obvious value to most iPhone users.