Just saw on the Moto site that the Pie update for the X4 Prime Edition started a phased roll out yesterday, with an estimated completion of February 8. Hope to get it sooner rather than later
Just got the update last night. First thing I noticed is that it made the SwiftKey keyboard HUGE. Changed the setting to smallest and it's still bigger than half the screen. And of course there is currently a problem with the SwiftKey help site.
Other than that the update looks good so far. I like the subtle GUI changes that they made.