This was the same post he said he wouldn’t license Apple’s DRM. But if the music industry would license their music DRM free, the interoperability goals would be achieved an Apple would sell DRM free music.
One of the major record labels and some independent labels took him up on it immediately. It took two years for the rest to come onboard.
iMessage always supported SMS and now RCS. What more did you expect Apple to do?
Even the then CEO of Google used BlackBerry devices years after Android came out as opposed to SJ who used the iPhone before it was released and after it was announced, saw that the screen was easily scratched and publicly did a press release that they were going to change it to use Gorilla Glass from plastic.