The image recipes are highly desirable for Nikon Zf customers, too because many FUJI users have interest in switching to a Zf and they want something comparable to the FUJI film simulations. Limiting the Imaging Cloud only to the Z6 III would be a failure as it would expand the modern workflow like we know from smartphones to any modern Z camera.
Adding a direct function "Upload to Imaging Cloud" within NX Studio and Picture Control Utility after adjusting picture control settings would enhance the workflow between editing images on a computer and getting the final output on the camera, too. The cloud could be also used to backup or exchange camera settings like the U1, U2, U3 presets.