Fujifilm GFX 50s: Some Progress, and Fujifilm’s Diagnosis
See my Fujifilm GFX wish list.
Adobe Camera Raw 9.9.0 now supports the Fujifilm GFX.

It is a huge hassle to shoot the defective GFX, because I have to find and delete all the excess (and variable number!) of exposures it shoots in its stuck-on Continuous mode (aperture series and ISO series are quite the headache), but I have no immediate word of a replacement, so I want to get some material shot and done. So in spite of the tedious overhead of just sorting the images I am forging ahead for the time being (half an hour just to sort the images from one short shoot).
Regarding my troubles with the Fujifilm GFX Continuous mode, I spoke with a professional and courteous Fujifilm tech support (Steve P @ 1-800-800-3854) about the issue. We stepped through what I was doing and found no solution. I have nothing but good things to say about the customer support experience (except that I have had no followup call).
The diagnosis is a bad GFX with some kind of electronics problem. So the GFX is going back to B&H to await a replacement.
In the meantime (until I get a replacement), I’ve pushed through the Continuous exposure problem by just letting it do its thing, that is deleting all the extra unwanted exposures. So I should be able to post some material soon.
Adobe Camera Raw update is due at end of this week from what I am hearing, so then I should also be able to compare RAW/RAF to JPEG as well as do my usual processing for consistent comparison to other cameras, like the Hasselblad X1D. In the meantime, I’m looking at lens performance and ISO performance in general.
By the way the Fujifilm app for iOS is pretty useless, good for demos I suppose.