@icing: No one "can" say it because it will clearly cause more outrage and controversy. I consider it true since no exisiting console or game has a shared online community consisting of 30fps and 60 or more. This is why games locked at 60 but at 1080p for online.
@xantufrog: Cross play will have locked frames. Unless someone with proof of any games out there allowing unlimited frames to play along with locked 30 games, I doubt it can happen.
That update makes more sense since it's impossible to allow Xbox One communities to mix frame rates. The Xbox One X on it's own could have been 60fps but the base model will always hold it back at 30fps for online communities unless there are substantial sacrifices to the game effecting both platforms. Essentially the same problem Destiny 2 is having.
KhanWasHere's comments