I'm so glad these 1960s-certified radios put out harmonics. (Hint: they don't have to)
Comms technology has progressed so much since then.
I have household $10 zigbee devices with more technology than this rubbish.
Store-and-forward systems / peer-to-peer with uplinks via larger aircraft with LEO satellite connectivty) + prioritisation of comms will do wonders + multiple transmit buttons (area broadcast or to designated receiver (eg ATC)) would do wonders.
Directed messages too - so I don't need to hear somebody modify a flight plan etc.