What if you put a Z-mount DX lens onto a Z6, it will obviously fit and apart from a possible loss of image quality what do you get, presumably a cropped image?Presumably you can use any Z-mount lens on this camera, as well as F-mount through the FTZ adapter. The camera is not crippled by the "kit" lenses.
You can't disable the auto switch? Can you override it? Select an FX image size with a DX lens on? (No I'm not really sure why you would other than to induce vignetting.)But unlike at least some of the DSLRs it is impossible to disable the switch to DX mode. This seems like something that could be altered in firmware.