I know we're all supposed to take the measurements by DxO with a grain of salt, but if you compare the dynamic range measurements between the G1X and the G7X it strikes me that the dynamic range advantage of the G7X is only there at ISO 100, already reduced at ISO 200, and non-existent from ISO 400 on up. I don't hear G7X users say they only shoot at ISO 100 for fear of losing that high DR.
That's true, but that's true of most any camera that boasts really high DR scores. The Nikon D810 has almost two stops more DR than the Nikon D4 / DF at base ISO, but the lines cross before ISO 400 and the D4 / DF has an advantage after that. But for daylight landscape shooting (where DR seems to be the biggest issue for me), that's still a pretty big difference, and worth taking into account. I do a LOT of low light shooting, or at least high ISO shooting (sometimes in light that's good enough for much lower ISOs if I was willing to slow down the shutter or open up the aperture), so the DF was a better choice for me. And I'm happy enough with it for base ISO landscapes too, because it's not like 13+ stops isn't still a LOT of DR. But when I shot with a D610 and RX1, there was something about processing those files that I've never found with anything else, including the DF, as much as I love the DF. If I was still as gear obsessed as I've been at times, I'd probably find a used D610 body for shooting almost exclusively in good light. But I'm not, and the fact is that the DF is still really good at base ISO and the D610 is still really good in low light, so it just came down to which was better suited for me.
But in the case of the case of the G1X vs the G7X, the G7X has notably more DR at base ISO AND just about matches the G1X at high ISO (despite the much smaller sensor), so I probably won't seriously consider a G1X until they update the sensor in a new body, if they keep the model alive long enough. At which point, I'd probably be all over it. For me, DR numbers are just numbers, but when I pull up a raw file and start trying to work with it, the practical realities of DR become really apparent, and when I do that with D610, DF, or G7X files, I'm very satisfied. With the G1X files I've downloaded and tried to work with, I get pretty frustrated. Which doesn't mean the same would be true of folks who process their work less or differently than I do. It's still a damn fine camera, but it's incumbent on each of us to know what works best for our way of shooting/processing, and the G1X isn't for me. At least with the current sensor.
-Ray