[JJ_SO]

You own a Nikon Z? Really?
The D850 is not affacted, as far as I know. It does not have the PD AF in the imaging sensor?

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You do have uncompressed option on the newest Sony bodies, yes. The result is huge RAW files.

Since last Thursday.

No, the D850 has no PDAF in LiveView. And I have (so far) no update of Capture One to work a bit more with RAW-files. So, all I say is at the moment strictly limited to JPGs and the noise reduction at higher ISO is (in standard setting) rather strong.

The RAW compression fo Nikon is 14 bit lossless, resulting in 50-60 MB files. Fuji's uncompressed RAW is just as big  - for half the MP-output. I find the better compression is simply delete the crap and keep the better ones, but don't switch to lossy compression just to save diskspace.

And to the banding: It's not to offend you, but comparing a current Canon 5DIV or 6DII to the Z7, I rather prefer the banding than the Canon results of pulling 6 stops "out of the shadows into the light". Should affect you because for you DR is not that important...   And I 'd say only the 5DIV (form Canon) delivers similar shadow performance at +4EV like the Z7 

We'll see what the findings will be with EOS R.