It’s also worth noting that the resolution of the receiver or level of sensitivity required for actually receiving the data from these mediums from any consider

It’s also worth noting that the resolution of the receiver or level of sensitivity required for actually receiving the data from these mediums from any considerable distance (from within a metal computer chassis case) even if it exists, will not be something that is likely attainable by a non nation state. Also the amount of man hours required to set up a working receiver that is outside of detectable range would be too expensive to consider using this tech against anything but an extremely valuable target. There are of course other possible methods of pulling this off such as if a nearby mobile device is compromised it could be used to listen and repeat the weak RF signal coming from the memory but that would be another level of complexity keeping this from being an efficient technique. Also of note is that there would be no way for the listener to reliably communicate with the compromised airgapped device to update their code if there is a problem so the communication would be similar to one way UDP.