@Bob-Sandifer Please contact proservice@magix.net for a more definitive answer.

To my knowledge it's under consideration. There was a user poll some months ago at https://community.samplitude.com/topic/59200-poll-samplitude-pro-x9-features/ but Atmos support only got a little bit less than 7% of the votes. So, in my opinion, it probably will come, but it will take time unless there is a large customer who's paying a lot and demands a timely implementation in the near future.