The firmware has been adjusted to provide a small electric shock when the photographer fails to keep the subject in the frame. This is expected to greatly improve subject detection and tracking.
What you forgot to mention, Morris, is the new Fuji accessory needed with the new FW, the FXWATT4.01. It is a special, adjustable helmet attached, via cable, to the USB port to transmit the electric shock effectively to the brain. 🤣