>>4529624There is nothing meaningful you can do to improve the RX100 without breaking the design philosophy.
a9 tier AF, Stacked BSI sensor, EVF, 4k video, IBIS, tilt screen, zoom lens.
Upgrading the sensor, glass or processor wouldn't justify a new camera.
Upgrading the size of the sensor or glass would increase the size of the camera.
That said. If Sony made a RX500 the size of a Fujifilm X-e5 with APSC sensor and 28-200mm f.2.8-5.6 or 28-75 f.1.8-3.2 while keeping all the other features, that would be insane.