@ kvbarkley -- thanks for your very quick response to my question. If my problem had been transferring images from the camera to the PC, your suggestion might certainly help. But my end-of-seesion routine is to swap the battery for a freshly charged one, take out the card, stuff it into the reader on the PC, dump all the RAW session to my NAS drive and reformat the card before replacing it.
No, unfortunately, as my post mentioned, I need the WiFi for tethered shooting, with the benefit of a nice 4K display to get a better idea of what the camera sees, while sitting in a comfy seat maybe in the next room, setting aperture, exposure, focus points etc. with a mouse instead of crouching over a potty little sub-megapixel display and stabbing at the camera buttons. Try that in portrait mode, only a metre or so from the floor, and your knees and neck won't last long....
I guess I'll just have to get a nice big tablet -- maybe a secondhand Nexus 10 or something -- but I'll miss the big monitor.; unless there's anyone out there who can suggest how I might fool the camera into thinking it was communicating with a phone... or something else....
